diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 4ab09f2202d444c43717502207c23618955a4101..c2340eeeb97ff072196dbcd49144897813b1573d 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -37,9 +37,10 @@ Required properties when using sub-nodes:
 
 
 Sub-nodes required properties:
-- reg               : the port number
-- phys              : reference to the SATA PHY node
-
+- reg		    : the port number
+And at least one of the following properties:
+- phys		    : reference to the SATA PHY node
+- target-supply    : regulator for SATA target power
 
 Examples:
         sata@ffe08000 {
@@ -68,10 +69,12 @@ With sub-nodes:
 		sata0: sata-port@0 {
 			reg = <0>;
 			phys = <&sata_phy 0>;
+			target-supply = <&reg_sata0>;
 		};
 
 		sata1: sata-port@1 {
 			reg = <1>;
 			phys = <&sata_phy 1>;
+			target-supply = <&reg_sata1>;;
 		};
 	};
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 5f601553b9b043fff9ac80552ab55dbc4173c714..e7f338a3a3c2b3e687b348919aacd2409deae33a 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -269,7 +269,7 @@ config ATA_PIIX
 
 config SATA_DWC
 	tristate "DesignWare Cores SATA support"
-	depends on 460EX
+	depends on 460EX || (COMPILE_TEST && !(ARM || ARM64))
 	help
 	  This option enables support for the on-chip SATA controller of the
 	  AppliedMicro processor 460EX.
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 40f0e34f17af38e84167f79c162bf3b5922004ed..71262e08648e72d786cf8dca1f6bb338bee4375c 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -333,7 +333,7 @@ struct ahci_host_priv {
 	u32			em_msg_type;	/* EM message type */
 	bool			got_runtime_pm; /* Did we do pm_runtime_get? */
 	struct clk		*clks[AHCI_MAX_CLKS]; /* Optional */
-	struct regulator	*target_pwr;	/* Optional */
+	struct regulator	**target_pwrs;	/* Optional */
 	/*
 	 * If platform uses PHYs. There is a 1:1 relation between the port number and
 	 * the PHY position in this array.
@@ -354,6 +354,10 @@ extern int ahci_ignore_sss;
 extern struct device_attribute *ahci_shost_attrs[];
 extern struct device_attribute *ahci_sdev_attrs[];
 
+/*
+ * This must be instantiated by the edge drivers.  Read the comments
+ * for ATA_BASE_SHT
+ */
 #define AHCI_SHT(drv_name)						\
 	ATA_NCQ_SHT(drv_name),						\
 	.can_queue		= AHCI_MAX_CMDS - 1,			\
diff --git a/drivers/ata/ahci_da850.c b/drivers/ata/ahci_da850.c
index ce8a7a6d6c7fee3c8f28aa5c3367bd566bdf23e8..267a3d3e79f4dc755be11b903453b687d94c313e 100644
--- a/drivers/ata/ahci_da850.c
+++ b/drivers/ata/ahci_da850.c
@@ -16,6 +16,8 @@
 #include <linux/ahci_platform.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci_da850"
+
 /* SATA PHY Control Register offset from AHCI base */
 #define SATA_P0PHYCR_REG	0x178
 
@@ -59,6 +61,10 @@ static const struct ata_port_info ahci_da850_port_info = {
 	.port_ops	= &ahci_platform_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int ahci_da850_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -85,7 +91,8 @@ static int ahci_da850_probe(struct platform_device *pdev)
 
 	da850_sata_init(dev, pwrdn_reg, hpriv->mmio);
 
-	rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_da850_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -102,7 +109,7 @@ static struct platform_driver ahci_da850_driver = {
 	.probe = ahci_da850_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci_da850",
+		.name = DRV_NAME,
 		.pm = &ahci_da850_pm_ops,
 	},
 };
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 35d51c59a370d5c6dbbfe7a3e36a2808754434e7..3f3a7db208ae51d2734f0be82e01d9682ce9c80b 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -28,6 +28,8 @@
 #include <linux/libata.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci-imx"
+
 enum {
 	/* Timer 1-ms Register */
 	IMX_TIMER1MS				= 0x00e0,
@@ -221,11 +223,9 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv)
 	if (imxpriv->no_device)
 		return 0;
 
-	if (hpriv->target_pwr) {
-		ret = regulator_enable(hpriv->target_pwr);
-		if (ret)
-			return ret;
-	}
+	ret = ahci_platform_enable_regulators(hpriv);
+	if (ret)
+		return ret;
 
 	ret = clk_prepare_enable(imxpriv->sata_ref_clk);
 	if (ret < 0)
@@ -270,8 +270,7 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv)
 disable_clk:
 	clk_disable_unprepare(imxpriv->sata_ref_clk);
 disable_regulator:
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	ahci_platform_disable_regulators(hpriv);
 
 	return ret;
 }
@@ -291,8 +290,7 @@ static void imx_sata_disable(struct ahci_host_priv *hpriv)
 
 	clk_disable_unprepare(imxpriv->sata_ref_clk);
 
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	ahci_platform_disable_regulators(hpriv);
 }
 
 static void ahci_imx_error_handler(struct ata_port *ap)
@@ -524,6 +522,10 @@ static u32 imx_ahci_parse_props(struct device *dev,
 	return reg_value;
 }
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int imx_ahci_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -620,7 +622,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
 	reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
 	writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
 
-	ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info);
+	ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
+				      &ahci_platform_sht);
 	if (ret)
 		goto disable_sata;
 
@@ -678,7 +681,7 @@ static struct platform_driver imx_ahci_driver = {
 	.probe = imx_ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci-imx",
+		.name = DRV_NAME,
 		.of_match_table = imx_ahci_of_match,
 		.pm = &ahci_imx_pm_ops,
 	},
diff --git a/drivers/ata/ahci_mvebu.c b/drivers/ata/ahci_mvebu.c
index 64bb08432b6965208505aed9e297d0cb73d11b0a..23716dd8a7ec3f569f82db531e1ed71bc330c7d6 100644
--- a/drivers/ata/ahci_mvebu.c
+++ b/drivers/ata/ahci_mvebu.c
@@ -19,6 +19,8 @@
 #include <linux/platform_device.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci-mvebu"
+
 #define AHCI_VENDOR_SPECIFIC_0_ADDR  0xa0
 #define AHCI_VENDOR_SPECIFIC_0_DATA  0xa4
 
@@ -67,6 +69,10 @@ static const struct ata_port_info ahci_mvebu_port_info = {
 	.port_ops  = &ahci_platform_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int ahci_mvebu_probe(struct platform_device *pdev)
 {
 	struct ahci_host_priv *hpriv;
@@ -88,7 +94,8 @@ static int ahci_mvebu_probe(struct platform_device *pdev)
 	ahci_mvebu_mbus_config(hpriv, dram);
 	ahci_mvebu_regret_option(hpriv);
 
-	rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -114,7 +121,7 @@ static struct platform_driver ahci_mvebu_driver = {
 	.probe = ahci_mvebu_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci-mvebu",
+		.name = DRV_NAME,
 		.of_match_table = ahci_mvebu_of_match,
 	},
 };
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 18d539837045db4422712038164d7270b5562080..78d6ae0b90c400f807f18cdd6f4b6d214d175a32 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -22,6 +22,8 @@
 #include <linux/ahci_platform.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci"
+
 static const struct ata_port_info ahci_port_info = {
 	.flags		= AHCI_FLAG_COMMON,
 	.pio_mask	= ATA_PIO4,
@@ -29,6 +31,10 @@ static const struct ata_port_info ahci_port_info = {
 	.port_ops	= &ahci_platform_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int ahci_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -46,7 +52,8 @@ static int ahci_probe(struct platform_device *pdev)
 	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
 		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
 
-	rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -75,7 +82,7 @@ static struct platform_driver ahci_driver = {
 	.probe = ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci",
+		.name = DRV_NAME,
 		.of_match_table = ahci_of_match,
 		.pm = &ahci_pm_ops,
 	},
diff --git a/drivers/ata/ahci_st.c b/drivers/ata/ahci_st.c
index 2f9e8317cc168690f757d41b3a3eda3c186d0259..bc971af262e75f89cb64af2b408fb6a7ab0fdb03 100644
--- a/drivers/ata/ahci_st.c
+++ b/drivers/ata/ahci_st.c
@@ -23,6 +23,8 @@
 
 #include "ahci.h"
 
+#define DRV_NAME  "st_ahci"
+
 #define ST_AHCI_OOBR			0xbc
 #define ST_AHCI_OOBR_WE			BIT(31)
 #define ST_AHCI_OOBR_CWMIN_SHIFT	24
@@ -140,6 +142,10 @@ static const struct ata_port_info st_ahci_port_info = {
 	.port_ops       = &st_ahci_port_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int st_ahci_probe(struct platform_device *pdev)
 {
 	struct st_ahci_drv_data *drv_data;
@@ -166,7 +172,8 @@ static int st_ahci_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info);
+	err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info,
+				      &ahci_platform_sht);
 	if (err) {
 		ahci_platform_disable_resources(hpriv);
 		return err;
@@ -229,7 +236,7 @@ MODULE_DEVICE_TABLE(of, st_ahci_match);
 
 static struct platform_driver st_ahci_driver = {
 	.driver = {
-		.name = "st_ahci",
+		.name = DRV_NAME,
 		.pm = &st_ahci_pm_ops,
 		.of_match_table = of_match_ptr(st_ahci_match),
 	},
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
index e2e0da539a2f7c5519c9c4c181054949dd6056fe..b26437430163e89f2c9a81e725df51d5c6c777f3 100644
--- a/drivers/ata/ahci_sunxi.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -27,6 +27,8 @@
 #include <linux/regulator/consumer.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci-sunxi"
+
 /* Insmod parameters */
 static bool enable_pmp;
 module_param(enable_pmp, bool, 0);
@@ -169,6 +171,10 @@ static const struct ata_port_info ahci_sunxi_port_info = {
 	.port_ops	= &ahci_platform_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int ahci_sunxi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -200,7 +206,8 @@ static int ahci_sunxi_probe(struct platform_device *pdev)
 	if (!enable_pmp)
 		hpriv->flags |= AHCI_HFLAG_NO_PMP;
 
-	rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -251,7 +258,7 @@ static struct platform_driver ahci_sunxi_driver = {
 	.probe = ahci_sunxi_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci-sunxi",
+		.name = DRV_NAME,
 		.of_match_table = ahci_sunxi_of_match,
 		.pm = &ahci_sunxi_pm_ops,
 	},
diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c
index 032904402c9509af14eafdc36993e8d6eb39ac88..3a62eb246d80bc6323cfdbc18874511ce043e7f6 100644
--- a/drivers/ata/ahci_tegra.c
+++ b/drivers/ata/ahci_tegra.c
@@ -31,6 +31,8 @@
 
 #include "ahci.h"
 
+#define DRV_NAME "tegra-ahci"
+
 #define SATA_CONFIGURATION_0				0x180
 #define SATA_CONFIGURATION_EN_FPCI			BIT(0)
 
@@ -289,6 +291,10 @@ static const struct of_device_id tegra_ahci_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, tegra_ahci_of_match);
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int tegra_ahci_probe(struct platform_device *pdev)
 {
 	struct ahci_host_priv *hpriv;
@@ -354,7 +360,8 @@ static int tegra_ahci_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info);
+	ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info,
+				      &ahci_platform_sht);
 	if (ret)
 		goto deinit_controller;
 
@@ -370,7 +377,7 @@ static struct platform_driver tegra_ahci_driver = {
 	.probe = tegra_ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "tegra-ahci",
+		.name = DRV_NAME,
 		.of_match_table = tegra_ahci_of_match,
 	},
 	/* LP0 suspend support not implemented */
diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index cbcd2081035573e9897db0afd475224c176231d3..2e8bb603e44750b749c933a4dd71db1648e5f732 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -30,6 +30,8 @@
 #include <linux/phy/phy.h>
 #include "ahci.h"
 
+#define DRV_NAME "xgene-ahci"
+
 /* Max # of disk per a controller */
 #define MAX_AHCI_CHN_PERCTR		2
 
@@ -85,6 +87,7 @@ struct xgene_ahci_context {
 	struct ahci_host_priv *hpriv;
 	struct device *dev;
 	u8 last_cmd[MAX_AHCI_CHN_PERCTR]; /* tracking the last command issued*/
+	u32 class[MAX_AHCI_CHN_PERCTR]; /* tracking the class of device */
 	void __iomem *csr_core;		/* Core CSR address of IP */
 	void __iomem *csr_diag;		/* Diag CSR address of IP */
 	void __iomem *csr_axi;		/* AXI CSR address of IP */
@@ -104,18 +107,70 @@ static int xgene_ahci_init_memram(struct xgene_ahci_context *ctx)
 	return 0;
 }
 
+/**
+ * xgene_ahci_poll_reg_val- Poll a register on a specific value.
+ * @ap : ATA port of interest.
+ * @reg : Register of interest.
+ * @val : Value to be attained.
+ * @interval : waiting interval for polling.
+ * @timeout : timeout for achieving the value.
+ */
+static int xgene_ahci_poll_reg_val(struct ata_port *ap,
+				   void __iomem *reg, unsigned
+				   int val, unsigned long interval,
+				   unsigned long timeout)
+{
+	unsigned long deadline;
+	unsigned int tmp;
+
+	tmp = ioread32(reg);
+	deadline = ata_deadline(jiffies, timeout);
+
+	while (tmp != val && time_before(jiffies, deadline)) {
+		ata_msleep(ap, interval);
+		tmp = ioread32(reg);
+	}
+
+	return tmp;
+}
+
 /**
  * xgene_ahci_restart_engine - Restart the dma engine.
  * @ap : ATA port of interest
  *
- * Restarts the dma engine inside the controller.
+ * Waits for completion of multiple commands and restarts
+ * the DMA engine inside the controller.
  */
 static int xgene_ahci_restart_engine(struct ata_port *ap)
 {
 	struct ahci_host_priv *hpriv = ap->host->private_data;
+	struct ahci_port_priv *pp = ap->private_data;
+	void __iomem *port_mmio = ahci_port_base(ap);
+	u32 fbs;
+
+	/*
+	 * In case of PMP multiple IDENTIFY DEVICE commands can be
+	 * issued inside PxCI. So need to poll PxCI for the
+	 * completion of outstanding IDENTIFY DEVICE commands before
+	 * we restart the DMA engine.
+	 */
+	if (xgene_ahci_poll_reg_val(ap, port_mmio +
+				    PORT_CMD_ISSUE, 0x0, 1, 100))
+		  return -EBUSY;
 
 	ahci_stop_engine(ap);
 	ahci_start_fis_rx(ap);
+
+	/*
+	 * Enable the PxFBS.FBS_EN bit as it
+	 * gets cleared due to stopping the engine.
+	 */
+	if (pp->fbs_supported) {
+		fbs = readl(port_mmio + PORT_FBS);
+		writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
+		fbs = readl(port_mmio + PORT_FBS);
+	}
+
 	hpriv->start_engine(ap);
 
 	return 0;
@@ -125,11 +180,17 @@ static int xgene_ahci_restart_engine(struct ata_port *ap)
  * xgene_ahci_qc_issue - Issue commands to the device
  * @qc: Command to issue
  *
- * Due to Hardware errata for IDENTIFY DEVICE command and PACKET
- * command of ATAPI protocol set, the controller cannot clear the BSY bit
- * after receiving the PIO setup FIS. This results in the DMA state machine
- * going into the CMFatalErrorUpdate state and locks up. By restarting the
- * DMA engine, it removes the controller out of lock up state.
+ * Due to Hardware errata for IDENTIFY DEVICE command, the controller cannot
+ * clear the BSY bit after receiving the PIO setup FIS. This results in the dma
+ * state machine goes into the CMFatalErrorUpdate state and locks up. By
+ * restarting the dma engine, it removes the controller out of lock up state.
+ *
+ * Due to H/W errata, the controller is unable to save the PMP
+ * field fetched from command header before sending the H2D FIS.
+ * When the device returns the PMP port field in the D2H FIS, there is
+ * a mismatch and results in command completion failure. The
+ * workaround is to write the pmp value to PxFBS.DEV field before issuing
+ * any command to PMP.
  */
 static unsigned int xgene_ahci_qc_issue(struct ata_queued_cmd *qc)
 {
@@ -137,9 +198,23 @@ static unsigned int xgene_ahci_qc_issue(struct ata_queued_cmd *qc)
 	struct ahci_host_priv *hpriv = ap->host->private_data;
 	struct xgene_ahci_context *ctx = hpriv->plat_data;
 	int rc = 0;
+	u32 port_fbs;
+	void *port_mmio = ahci_port_base(ap);
+
+	/*
+	 * Write the pmp value to PxFBS.DEV
+	 * for case of Port Mulitplier.
+	 */
+	if (ctx->class[ap->port_no] == ATA_DEV_PMP) {
+		port_fbs = readl(port_mmio + PORT_FBS);
+		port_fbs &= ~PORT_FBS_DEV_MASK;
+		port_fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
+		writel(port_fbs, port_mmio + PORT_FBS);
+	}
 
 	if (unlikely((ctx->last_cmd[ap->port_no] == ATA_CMD_ID_ATA) ||
-	    (ctx->last_cmd[ap->port_no] == ATA_CMD_PACKET)))
+	    (ctx->last_cmd[ap->port_no] == ATA_CMD_PACKET) ||
+	    (ctx->last_cmd[ap->port_no] == ATA_CMD_SMART)))
 		xgene_ahci_restart_engine(ap);
 
 	rc = ahci_qc_issue(qc);
@@ -365,16 +440,119 @@ static void xgene_ahci_host_stop(struct ata_host *host)
 	ahci_platform_disable_resources(hpriv);
 }
 
+/**
+ * xgene_ahci_pmp_softreset - Issue the softreset to the drives connected
+ *                            to Port Multiplier.
+ * @link: link to reset
+ * @class: Return value to indicate class of device
+ * @deadline: deadline jiffies for the operation
+ *
+ * Due to H/W errata, the controller is unable to save the PMP
+ * field fetched from command header before sending the H2D FIS.
+ * When the device returns the PMP port field in the D2H FIS, there is
+ * a mismatch and results in command completion failure. The workaround
+ * is to write the pmp value to PxFBS.DEV field before issuing any command
+ * to PMP.
+ */
+static int xgene_ahci_pmp_softreset(struct ata_link *link, unsigned int *class,
+			  unsigned long deadline)
+{
+	int pmp = sata_srst_pmp(link);
+	struct ata_port *ap = link->ap;
+	u32 rc;
+	void *port_mmio = ahci_port_base(ap);
+	u32 port_fbs;
+
+	/*
+	 * Set PxFBS.DEV field with pmp
+	 * value.
+	 */
+	port_fbs = readl(port_mmio + PORT_FBS);
+	port_fbs &= ~PORT_FBS_DEV_MASK;
+	port_fbs |= pmp << PORT_FBS_DEV_OFFSET;
+	writel(port_fbs, port_mmio + PORT_FBS);
+
+	rc = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
+
+	return rc;
+}
+
+/**
+ * xgene_ahci_softreset - Issue the softreset to the drive.
+ * @link: link to reset
+ * @class: Return value to indicate class of device
+ * @deadline: deadline jiffies for the operation
+ *
+ * Due to H/W errata, the controller is unable to save the PMP
+ * field fetched from command header before sending the H2D FIS.
+ * When the device returns the PMP port field in the D2H FIS, there is
+ * a mismatch and results in command completion failure. The workaround
+ * is to write the pmp value to PxFBS.DEV field before issuing any command
+ * to PMP. Here is the algorithm to detect PMP :
+ *
+ * 1. Save the PxFBS value
+ * 2. Program PxFBS.DEV with pmp value send by framework. Framework sends
+ *    0xF for both PMP/NON-PMP initially
+ * 3. Issue softreset
+ * 4. If signature class is PMP goto 6
+ * 5. restore the original PxFBS and goto 3
+ * 6. return
+ */
+static int xgene_ahci_softreset(struct ata_link *link, unsigned int *class,
+			  unsigned long deadline)
+{
+	int pmp = sata_srst_pmp(link);
+	struct ata_port *ap = link->ap;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
+	struct xgene_ahci_context *ctx = hpriv->plat_data;
+	void *port_mmio = ahci_port_base(ap);
+	u32 port_fbs;
+	u32 port_fbs_save;
+	u32 retry = 1;
+	u32 rc;
+
+	port_fbs_save = readl(port_mmio + PORT_FBS);
+
+	/*
+	 * Set PxFBS.DEV field with pmp
+	 * value.
+	 */
+	port_fbs = readl(port_mmio + PORT_FBS);
+	port_fbs &= ~PORT_FBS_DEV_MASK;
+	port_fbs |= pmp << PORT_FBS_DEV_OFFSET;
+	writel(port_fbs, port_mmio + PORT_FBS);
+
+softreset_retry:
+	rc = ahci_do_softreset(link, class, pmp,
+			       deadline, ahci_check_ready);
+
+	ctx->class[ap->port_no] = *class;
+	if (*class != ATA_DEV_PMP) {
+		/*
+		 * Retry for normal drives without
+		 * setting PxFBS.DEV field with pmp value.
+		 */
+		if (retry--) {
+			writel(port_fbs_save, port_mmio + PORT_FBS);
+			goto softreset_retry;
+		}
+	}
+
+	return rc;
+}
+
 static struct ata_port_operations xgene_ahci_ops = {
 	.inherits = &ahci_ops,
 	.host_stop = xgene_ahci_host_stop,
 	.hardreset = xgene_ahci_hardreset,
 	.read_id = xgene_ahci_read_id,
 	.qc_issue = xgene_ahci_qc_issue,
+	.softreset = xgene_ahci_softreset,
+	.pmp_softreset = xgene_ahci_pmp_softreset
 };
 
 static const struct ata_port_info xgene_ahci_port_info = {
-	.flags = AHCI_FLAG_COMMON,
+	.flags = AHCI_FLAG_COMMON | ATA_FLAG_PMP,
 	.pio_mask = ATA_PIO4,
 	.udma_mask = ATA_UDMA6,
 	.port_ops = &xgene_ahci_ops,
@@ -446,6 +624,10 @@ static int xgene_ahci_mux_select(struct xgene_ahci_context *ctx)
 	return val & CFG_SATA_ENET_SELECT_MASK ? -1 : 0;
 }
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int xgene_ahci_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -523,7 +705,8 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 skip_clk_phy:
 	hpriv->flags = AHCI_HFLAG_NO_PMP | AHCI_HFLAG_NO_NCQ;
 
-	rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -545,7 +728,7 @@ static struct platform_driver xgene_ahci_driver = {
 	.probe = xgene_ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "xgene-ahci",
+		.name = DRV_NAME,
 		.of_match_table = xgene_ahci_of_match,
 	},
 };
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 0b03f90566924182e4c0411a798c66837d4530ac..d89305d289f63f8a4afcb78773a19e42088790ba 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -24,6 +24,7 @@
 #include <linux/ahci_platform.h>
 #include <linux/phy/phy.h>
 #include <linux/pm_runtime.h>
+#include <linux/of_platform.h>
 #include "ahci.h"
 
 static void ahci_host_stop(struct ata_host *host);
@@ -34,10 +35,6 @@ struct ata_port_operations ahci_platform_ops = {
 };
 EXPORT_SYMBOL_GPL(ahci_platform_ops);
 
-static struct scsi_host_template ahci_platform_sht = {
-	AHCI_SHT("ahci_platform"),
-};
-
 /**
  * ahci_platform_enable_phys - Enable PHYs
  * @hpriv: host private area to store config values
@@ -54,9 +51,6 @@ static int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
 	int rc, i;
 
 	for (i = 0; i < hpriv->nports; i++) {
-		if (!hpriv->phys[i])
-			continue;
-
 		rc = phy_init(hpriv->phys[i]);
 		if (rc)
 			goto disable_phys;
@@ -89,9 +83,6 @@ static void ahci_platform_disable_phys(struct ahci_host_priv *hpriv)
 	int i;
 
 	for (i = 0; i < hpriv->nports; i++) {
-		if (!hpriv->phys[i])
-			continue;
-
 		phy_power_off(hpriv->phys[i]);
 		phy_exit(hpriv->phys[i]);
 	}
@@ -143,6 +134,59 @@ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
 }
 EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
 
+/**
+ * ahci_platform_enable_regulators - Enable regulators
+ * @hpriv: host private area to store config values
+ *
+ * This function enables all the regulators found in
+ * hpriv->target_pwrs, if any.  If a regulator fails to be enabled, it
+ * disables all the regulators already enabled in reverse order and
+ * returns an error.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv)
+{
+	int rc, i;
+
+	for (i = 0; i < hpriv->nports; i++) {
+		if (!hpriv->target_pwrs[i])
+			continue;
+
+		rc = regulator_enable(hpriv->target_pwrs[i]);
+		if (rc)
+			goto disable_target_pwrs;
+	}
+
+	return 0;
+
+disable_target_pwrs:
+	while (--i >= 0)
+		if (hpriv->target_pwrs[i])
+			regulator_disable(hpriv->target_pwrs[i]);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_enable_regulators);
+
+/**
+ * ahci_platform_disable_regulators - Disable regulators
+ * @hpriv: host private area to store config values
+ *
+ * This function disables all regulators found in hpriv->target_pwrs.
+ */
+void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv)
+{
+	int i;
+
+	for (i = 0; i < hpriv->nports; i++) {
+		if (!hpriv->target_pwrs[i])
+			continue;
+		regulator_disable(hpriv->target_pwrs[i]);
+	}
+}
+EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);
 /**
  * ahci_platform_enable_resources - Enable platform resources
  * @hpriv: host private area to store config values
@@ -163,11 +207,9 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
 {
 	int rc;
 
-	if (hpriv->target_pwr) {
-		rc = regulator_enable(hpriv->target_pwr);
-		if (rc)
-			return rc;
-	}
+	rc = ahci_platform_enable_regulators(hpriv);
+	if (rc)
+		return rc;
 
 	rc = ahci_platform_enable_clks(hpriv);
 	if (rc)
@@ -183,8 +225,8 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
 	ahci_platform_disable_clks(hpriv);
 
 disable_regulator:
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	ahci_platform_disable_regulators(hpriv);
+
 	return rc;
 }
 EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
@@ -205,8 +247,7 @@ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
 
 	ahci_platform_disable_clks(hpriv);
 
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	ahci_platform_disable_regulators(hpriv);
 }
 EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
 
@@ -222,6 +263,69 @@ static void ahci_platform_put_resources(struct device *dev, void *res)
 
 	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
 		clk_put(hpriv->clks[c]);
+	/*
+	 * The regulators are tied to child node device and not to the
+	 * SATA device itself. So we can't use devm for automatically
+	 * releasing them. We have to do it manually here.
+	 */
+	for (c = 0; c < hpriv->nports; c++)
+		if (hpriv->target_pwrs && hpriv->target_pwrs[c])
+			regulator_put(hpriv->target_pwrs[c]);
+
+	kfree(hpriv->target_pwrs);
+}
+
+static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
+				struct device *dev, struct device_node *node)
+{
+	int rc;
+
+	hpriv->phys[port] = devm_of_phy_get(dev, node, NULL);
+
+	if (!IS_ERR(hpriv->phys[port]))
+		return 0;
+
+	rc = PTR_ERR(hpriv->phys[port]);
+	switch (rc) {
+	case -ENOSYS:
+		/* No PHY support. Check if PHY is required. */
+		if (of_find_property(node, "phys", NULL)) {
+			dev_err(dev,
+				"couldn't get PHY in node %s: ENOSYS\n",
+				node->name);
+			break;
+		}
+	case -ENODEV:
+		/* continue normally */
+		hpriv->phys[port] = NULL;
+		rc = 0;
+		break;
+
+	default:
+		dev_err(dev,
+			"couldn't get PHY in node %s: %d\n",
+			node->name, rc);
+
+		break;
+	}
+
+	return rc;
+}
+
+static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
+				struct device *dev)
+{
+	struct regulator *target_pwr;
+	int rc = 0;
+
+	target_pwr = regulator_get_optional(dev, "target");
+
+	if (!IS_ERR(target_pwr))
+		hpriv->target_pwrs[port] = target_pwr;
+	else
+		rc = PTR_ERR(target_pwr);
+
+	return rc;
 }
 
 /**
@@ -246,7 +350,7 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	struct clk *clk;
 	struct device_node *child;
-	int i, enabled_ports = 0, rc = -ENOMEM;
+	int i, sz, enabled_ports = 0, rc = -ENOMEM, child_nodes;
 	u32 mask_port_map = 0;
 
 	if (!devres_open_group(dev, NULL, GFP_KERNEL))
@@ -267,14 +371,6 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 		goto err_out;
 	}
 
-	hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
-	if (IS_ERR(hpriv->target_pwr)) {
-		rc = PTR_ERR(hpriv->target_pwr);
-		if (rc == -EPROBE_DEFER)
-			goto err_out;
-		hpriv->target_pwr = NULL;
-	}
-
 	for (i = 0; i < AHCI_MAX_CLKS; i++) {
 		/*
 		 * For now we must use clk_get(dev, NULL) for the first clock,
@@ -296,19 +392,33 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 		hpriv->clks[i] = clk;
 	}
 
-	hpriv->nports = of_get_child_count(dev->of_node);
+	hpriv->nports = child_nodes = of_get_child_count(dev->of_node);
 
-	if (hpriv->nports) {
-		hpriv->phys = devm_kzalloc(dev,
-					   hpriv->nports * sizeof(*hpriv->phys),
-					   GFP_KERNEL);
-		if (!hpriv->phys) {
-			rc = -ENOMEM;
-			goto err_out;
-		}
+	/*
+	 * If no sub-node was found, we still need to set nports to
+	 * one in order to be able to use the
+	 * ahci_platform_[en|dis]able_[phys|regulators] functions.
+	 */
+	if (!child_nodes)
+		hpriv->nports = 1;
 
+	sz = hpriv->nports * sizeof(*hpriv->phys);
+	hpriv->phys = devm_kzalloc(dev, sz, GFP_KERNEL);
+	if (!hpriv->phys) {
+		rc = -ENOMEM;
+		goto err_out;
+	}
+	sz = hpriv->nports * sizeof(*hpriv->target_pwrs);
+	hpriv->target_pwrs = kzalloc(sz, GFP_KERNEL);
+	if (!hpriv->target_pwrs) {
+		rc = -ENOMEM;
+		goto err_out;
+	}
+
+	if (child_nodes) {
 		for_each_child_of_node(dev->of_node, child) {
 			u32 port;
+			struct platform_device *port_dev __maybe_unused;
 
 			if (!of_device_is_available(child))
 				continue;
@@ -322,17 +432,24 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 				dev_warn(dev, "invalid port number %d\n", port);
 				continue;
 			}
-
 			mask_port_map |= BIT(port);
 
-			hpriv->phys[port] = devm_of_phy_get(dev, child, NULL);
-			if (IS_ERR(hpriv->phys[port])) {
-				rc = PTR_ERR(hpriv->phys[port]);
-				dev_err(dev,
-					"couldn't get PHY in node %s: %d\n",
-					child->name, rc);
-				goto err_out;
+#ifdef CONFIG_OF_ADDRESS
+			of_platform_device_create(child, NULL, NULL);
+
+			port_dev = of_find_device_by_node(child);
+
+			if (port_dev) {
+				rc = ahci_platform_get_regulator(hpriv, port,
+								&port_dev->dev);
+				if (rc == -EPROBE_DEFER)
+					goto err_out;
 			}
+#endif
+
+			rc = ahci_platform_get_phy(hpriv, port, dev, child);
+			if (rc)
+				goto err_out;
 
 			enabled_ports++;
 		}
@@ -349,38 +466,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 		 * If no sub-node was found, keep this for device tree
 		 * compatibility
 		 */
-		struct phy *phy = devm_phy_get(dev, "sata-phy");
-		if (!IS_ERR(phy)) {
-			hpriv->phys = devm_kzalloc(dev, sizeof(*hpriv->phys),
-						   GFP_KERNEL);
-			if (!hpriv->phys) {
-				rc = -ENOMEM;
-				goto err_out;
-			}
-
-			hpriv->phys[0] = phy;
-			hpriv->nports = 1;
-		} else {
-			rc = PTR_ERR(phy);
-			switch (rc) {
-				case -ENOSYS:
-					/* No PHY support. Check if PHY is required. */
-					if (of_find_property(dev->of_node, "phys", NULL)) {
-						dev_err(dev, "couldn't get sata-phy: ENOSYS\n");
-						goto err_out;
-					}
-				case -ENODEV:
-					/* continue normally */
-					hpriv->phys = NULL;
-					break;
-
-				default:
-					goto err_out;
+		rc = ahci_platform_get_phy(hpriv, 0, dev, dev->of_node);
+		if (rc)
+			goto err_out;
 
-			}
-		}
+		rc = ahci_platform_get_regulator(hpriv, 0, dev);
+		if (rc == -EPROBE_DEFER)
+			goto err_out;
 	}
-
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 	hpriv->got_runtime_pm = true;
@@ -399,6 +492,7 @@ EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
  * @pdev: platform device pointer for the host
  * @hpriv: ahci-host private data for the host
  * @pi_template: template for the ata_port_info to use
+ * @sht: scsi_host_template to use when registering
  *
  * This function does all the usual steps needed to bring up an
  * ahci-platform host, note any necessary resources (ie clks, phys, etc.)
@@ -409,7 +503,8 @@ EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
  */
 int ahci_platform_init_host(struct platform_device *pdev,
 			    struct ahci_host_priv *hpriv,
-			    const struct ata_port_info *pi_template)
+			    const struct ata_port_info *pi_template,
+			    struct scsi_host_template *sht)
 {
 	struct device *dev = &pdev->dev;
 	struct ata_port_info pi = *pi_template;
@@ -493,7 +588,7 @@ int ahci_platform_init_host(struct platform_device *pdev,
 	ahci_init_controller(host);
 	ahci_print_info(host, "platform");
 
-	return ahci_host_activate(host, irq, &ahci_platform_sht);
+	return ahci_host_activate(host, irq, sht);
 }
 EXPORT_SYMBOL_GPL(ahci_platform_init_host);
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d1a05f9bb91f239b6b24f115b6bade4694152698..4b0d5e71858e28e198f626be41cdaeb87aab2f08 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1751,33 +1751,6 @@ unsigned ata_exec_internal(struct ata_device *dev,
 				    timeout);
 }
 
-/**
- *	ata_do_simple_cmd - execute simple internal command
- *	@dev: Device to which the command is sent
- *	@cmd: Opcode to execute
- *
- *	Execute a 'simple' command, that only consists of the opcode
- *	'cmd' itself, without filling any other registers
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- *
- *	RETURNS:
- *	Zero on success, AC_ERR_* mask on failure
- */
-unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
-{
-	struct ata_taskfile tf;
-
-	ata_tf_init(dev, &tf);
-
-	tf.command = cmd;
-	tf.flags |= ATA_TFLAG_DEVICE;
-	tf.protocol = ATA_PROT_NODATA;
-
-	return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
-}
-
 /**
  *	ata_pio_need_iordy	-	check if iordy needed
  *	@adev: ATA device
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8d00c2638bed8ea499fb55bcd1b8b660c80be814..a9f5aed32d3993d603133073663941a398f11b76 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1635,7 +1635,6 @@ unsigned int atapi_eh_request_sense(struct ata_device *dev,
 
 	DPRINTK("ATAPI request sense\n");
 
-	/* FIXME: is this needed? */
 	memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
 
 	/* initialize sense_buf with the error register,
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 6abd17a85b1369d4515302090c6eb57a2d1d088b..280729325ebda91c51ada53d7e2c7f1bf3c16be0 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1995,8 +1995,8 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
 
 	VPRINTK("ENTER\n");
 
-	/* set scsi removeable (RMB) bit per ata bit */
-	if (ata_id_removeable(args->id))
+	/* set scsi removable (RMB) bit per ata bit */
+	if (ata_id_removable(args->id))
 		hdr[1] |= (1 << 7);
 
 	if (args->dev->class == ATA_DEV_ZAC) {
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 5f4e0cca56ec5fdc2cf539e3052bd9e2d51bca76..82ebe263d2f16121a3d483bbb7d39e2106d64dd0 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -76,7 +76,6 @@ extern unsigned ata_exec_internal_sg(struct ata_device *dev,
 				     struct ata_taskfile *tf, const u8 *cdb,
 				     int dma_dir, struct scatterlist *sg,
 				     unsigned int n_elem, unsigned long timeout);
-extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
 			  int (*check_ready)(struct ata_link *link));
 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 48ae4b43447450e221a8f016418f087df0f2d421..f9ca72e937ee177feb0f54d10afabd51fbd74183 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -276,10 +276,8 @@ static int cs5530_init_chip(void)
 	pci_dev_put(cs5530_0);
 	return 0;
 fail_put:
-	if (master_0)
-		pci_dev_put(master_0);
-	if (cs5530_0)
-		pci_dev_put(cs5530_0);
+	pci_dev_put(master_0);
+	pci_dev_put(cs5530_0);
 	return -ENODEV;
 }
 
diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
index dcc408abe17124c7fad39d84f2e2a7739d441ec3..b6b7af894d9dae92a40d140554e7c0923a2c8a7d 100644
--- a/drivers/ata/pata_of_platform.c
+++ b/drivers/ata/pata_of_platform.c
@@ -16,6 +16,12 @@
 #include <linux/ata_platform.h>
 #include <linux/libata.h>
 
+#define DRV_NAME "pata_of_platform"
+
+static struct scsi_host_template pata_platform_sht = {
+	ATA_PIO_SHT(DRV_NAME),
+};
+
 static int pata_of_platform_probe(struct platform_device *ofdev)
 {
 	int ret;
@@ -63,7 +69,7 @@ static int pata_of_platform_probe(struct platform_device *ofdev)
 	pio_mask |= (1 << pio_mode) - 1;
 
 	return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res,
-				     reg_shift, pio_mask);
+				     reg_shift, pio_mask, &pata_platform_sht);
 }
 
 static struct of_device_id pata_of_platform_match[] = {
@@ -74,7 +80,7 @@ MODULE_DEVICE_TABLE(of, pata_of_platform_match);
 
 static struct platform_driver pata_of_platform_driver = {
 	.driver = {
-		.name = "pata_of_platform",
+		.name = DRV_NAME,
 		.of_match_table = pata_of_platform_match,
 	},
 	.probe		= pata_of_platform_probe,
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 4d06a5cda987a7e5233d37d094957ef8369afc96..dca8251b1aeaed1fd38769f9a8e118d3b4357da5 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -28,6 +28,7 @@
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/ktime.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_cmnd.h>
@@ -605,7 +606,7 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
 	u32 scr;
 	long start_count, end_count;
-	struct timeval start_time, end_time;
+	ktime_t start_time, end_time;
 	long pll_clock, usec_elapsed;
 
 	/* Start the test mode */
@@ -616,14 +617,14 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 
 	/* Read current counter value */
 	start_count = pdc_read_counter(host);
-	do_gettimeofday(&start_time);
+	start_time = ktime_get();
 
 	/* Let the counter run for 100 ms. */
 	mdelay(100);
 
 	/* Read the counter values again */
 	end_count = pdc_read_counter(host);
-	do_gettimeofday(&end_time);
+	end_time = ktime_get();
 
 	/* Stop the test mode */
 	scr = ioread32(mmio_base + PDC_SYS_CTL);
@@ -632,8 +633,7 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	ioread32(mmio_base + PDC_SYS_CTL); /* flush */
 
 	/* calculate the input clock in Hz */
-	usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
-		(end_time.tv_usec - start_time.tv_usec);
+	usec_elapsed = (long) ktime_us_delta(end_time, start_time);
 
 	pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *
 		(100000000 / usec_elapsed);
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 1eedfe46d7c833e3d7cf6ea7fb9258cfc01683cc..c503ded87bb88a341cb0c2d1f9e22e0fb9ddd60f 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -78,6 +78,7 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr,
  *	@irq_res: Resource representing IRQ and its flags
  *	@ioport_shift: I/O port shift
  *	@__pio_mask: PIO mask
+ *	@sht: scsi_host_template to use when registering
  *
  *	Register a platform bus IDE interface. Such interfaces are PIO and we
  *	assume do not support IRQ sharing.
@@ -99,7 +100,8 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr,
  */
 int __pata_platform_probe(struct device *dev, struct resource *io_res,
 			  struct resource *ctl_res, struct resource *irq_res,
-			  unsigned int ioport_shift, int __pio_mask)
+			  unsigned int ioport_shift, int __pio_mask,
+			  struct scsi_host_template *sht)
 {
 	struct ata_host *host;
 	struct ata_port *ap;
@@ -170,7 +172,7 @@ int __pata_platform_probe(struct device *dev, struct resource *io_res,
 
 	/* activate */
 	return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
-				 irq_flags, &pata_platform_sht);
+				 irq_flags, sht);
 }
 EXPORT_SYMBOL_GPL(__pata_platform_probe);
 
@@ -216,7 +218,7 @@ static int pata_platform_probe(struct platform_device *pdev)
 
 	return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
 				     pp_info ? pp_info->ioport_shift : 0,
-				     pio_mask);
+				     pio_mask, &pata_platform_sht);
 }
 
 static struct platform_driver pata_platform_driver = {
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index 8e8248179d20577cf83d0270e324d1a867554554..fdb0f2879ea7c65a055eca20ccd8ba0642d0fc1e 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -48,6 +48,18 @@
 #define DRV_NAME        "sata-dwc"
 #define DRV_VERSION     "1.3"
 
+#ifndef out_le32
+#define out_le32(a, v)	__raw_writel(__cpu_to_le32(v), (void __iomem *)(a))
+#endif
+
+#ifndef in_le32
+#define in_le32(a)	__le32_to_cpu(__raw_readl((void __iomem *)(a)))
+#endif
+
+#ifndef NO_IRQ
+#define NO_IRQ		0
+#endif
+
 /* SATA DMA driver Globals */
 #define DMA_NUM_CHANS		1
 #define DMA_NUM_CHAN_REGS	8
@@ -273,7 +285,7 @@ struct sata_dwc_device {
 	struct device		*dev;		/* generic device struct */
 	struct ata_probe_ent	*pe;		/* ptr to probe-ent */
 	struct ata_host		*host;
-	u8			*reg_base;
+	u8 __iomem		*reg_base;
 	struct sata_dwc_regs	*sata_dwc_regs;	/* DW Synopsys SATA specific */
 	int			irq_dma;
 };
@@ -323,7 +335,9 @@ struct sata_dwc_host_priv {
 	struct	device	*dwc_dev;
 	int	dma_channel;
 };
-struct sata_dwc_host_priv host_pvt;
+
+static struct sata_dwc_host_priv host_pvt;
+
 /*
  * Prototypes
  */
@@ -580,9 +594,9 @@ static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
 
 	sms_val = 0;
 	dms_val = 1 + host_pvt.dma_channel;
-	dev_dbg(host_pvt.dwc_dev, "%s: sg=%p nelem=%d lli=%p dma_lli=0x%08x"
-		" dmadr=0x%08x\n", __func__, sg, num_elems, lli, (u32)dma_lli,
-		(u32)dmadr_addr);
+	dev_dbg(host_pvt.dwc_dev,
+		"%s: sg=%p nelem=%d lli=%p dma_lli=0x%pad dmadr=0x%p\n",
+		__func__, sg, num_elems, lli, &dma_lli, dmadr_addr);
 
 	bl = get_burst_length_encode(AHB_DMA_BRST_DFLT);
 
@@ -773,7 +787,7 @@ static void dma_dwc_exit(struct sata_dwc_device *hsdev)
 {
 	dev_dbg(host_pvt.dwc_dev, "%s:\n", __func__);
 	if (host_pvt.sata_dma_regs) {
-		iounmap(host_pvt.sata_dma_regs);
+		iounmap((void __iomem *)host_pvt.sata_dma_regs);
 		host_pvt.sata_dma_regs = NULL;
 	}
 
@@ -818,7 +832,7 @@ static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
 		return -EINVAL;
 	}
 
-	*val = in_le32((void *)link->ap->ioaddr.scr_addr + (scr * 4));
+	*val = in_le32(link->ap->ioaddr.scr_addr + (scr * 4));
 	dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
 		__func__, link->ap->print_id, scr, *val);
 
@@ -834,21 +848,19 @@ static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val)
 			 __func__, scr);
 		return -EINVAL;
 	}
-	out_le32((void *)link->ap->ioaddr.scr_addr + (scr * 4), val);
+	out_le32(link->ap->ioaddr.scr_addr + (scr * 4), val);
 
 	return 0;
 }
 
 static u32 core_scr_read(unsigned int scr)
 {
-	return in_le32((void __iomem *)(host_pvt.scr_addr_sstatus) +\
-			(scr * 4));
+	return in_le32(host_pvt.scr_addr_sstatus + (scr * 4));
 }
 
 static void core_scr_write(unsigned int scr, u32 val)
 {
-	out_le32((void __iomem *)(host_pvt.scr_addr_sstatus) + (scr * 4),
-		val);
+	out_le32(host_pvt.scr_addr_sstatus + (scr * 4), val);
 }
 
 static void clear_serror(void)
@@ -856,7 +868,6 @@ static void clear_serror(void)
 	u32 val;
 	val = core_scr_read(SCR_ERROR);
 	core_scr_write(SCR_ERROR, val);
-
 }
 
 static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit)
@@ -1256,24 +1267,24 @@ static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev)
 
 static void sata_dwc_setup_port(struct ata_ioports *port, unsigned long base)
 {
-	port->cmd_addr = (void *)base + 0x00;
-	port->data_addr = (void *)base + 0x00;
+	port->cmd_addr = (void __iomem *)base + 0x00;
+	port->data_addr = (void __iomem *)base + 0x00;
 
-	port->error_addr = (void *)base + 0x04;
-	port->feature_addr = (void *)base + 0x04;
+	port->error_addr = (void __iomem *)base + 0x04;
+	port->feature_addr = (void __iomem *)base + 0x04;
 
-	port->nsect_addr = (void *)base + 0x08;
+	port->nsect_addr = (void __iomem *)base + 0x08;
 
-	port->lbal_addr = (void *)base + 0x0c;
-	port->lbam_addr = (void *)base + 0x10;
-	port->lbah_addr = (void *)base + 0x14;
+	port->lbal_addr = (void __iomem *)base + 0x0c;
+	port->lbam_addr = (void __iomem *)base + 0x10;
+	port->lbah_addr = (void __iomem *)base + 0x14;
 
-	port->device_addr = (void *)base + 0x18;
-	port->command_addr = (void *)base + 0x1c;
-	port->status_addr = (void *)base + 0x1c;
+	port->device_addr = (void __iomem *)base + 0x18;
+	port->command_addr = (void __iomem *)base + 0x1c;
+	port->status_addr = (void __iomem *)base + 0x1c;
 
-	port->altstatus_addr = (void *)base + 0x20;
-	port->ctl_addr = (void *)base + 0x20;
+	port->altstatus_addr = (void __iomem *)base + 0x20;
+	port->ctl_addr = (void __iomem *)base + 0x20;
 }
 
 /*
@@ -1314,7 +1325,7 @@ static int sata_dwc_port_start(struct ata_port *ap)
 	for (i = 0; i < SATA_DWC_QCMD_MAX; i++)
 		hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT;
 
-	ap->bmdma_prd = 0;	/* set these so libata doesn't use them */
+	ap->bmdma_prd = NULL;	/* set these so libata doesn't use them */
 	ap->bmdma_prd_dma = 0;
 
 	/*
@@ -1511,8 +1522,8 @@ static void sata_dwc_qc_prep_by_tag(struct ata_queued_cmd *qc, u8 tag)
 
 	dma_chan = dma_dwc_xfer_setup(sg, qc->n_elem, hsdevp->llit[tag],
 				      hsdevp->llit_dma[tag],
-				      (void *__iomem)(&hsdev->sata_dwc_regs->\
-				      dmadr), qc->dma_dir);
+				      (void __iomem *)&hsdev->sata_dwc_regs->dmadr,
+				      qc->dma_dir);
 	if (dma_chan < 0) {
 		dev_err(ap->dev, "%s: dma_dwc_xfer_setup returns err %d\n",
 			__func__, dma_chan);
@@ -1585,8 +1596,8 @@ static void sata_dwc_error_handler(struct ata_port *ap)
 	ata_sff_error_handler(ap);
 }
 
-int sata_dwc_hardreset(struct ata_link *link, unsigned int *class,
-			unsigned long deadline)
+static int sata_dwc_hardreset(struct ata_link *link, unsigned int *class,
+			      unsigned long deadline)
 {
 	struct sata_dwc_device *hsdev = HSDEV_FROM_AP(link->ap);
 	int ret;
@@ -1618,7 +1629,7 @@ static struct scsi_host_template sata_dwc_sht = {
 	 * max of 1. This will get fixed in in a future release.
 	 */
 	.sg_tablesize		= LIBATA_MAX_PRD,
-	.can_queue		= ATA_DEF_QUEUE,	/* ATA_MAX_QUEUE */
+	/* .can_queue		= ATA_MAX_QUEUE, */
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 };
 
@@ -1655,7 +1666,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	struct sata_dwc_device *hsdev;
 	u32 idr, versionr;
 	char *ver = (char *)&versionr;
-	u8 *base = NULL;
+	u8 __iomem *base;
 	int err = 0;
 	int irq;
 	struct ata_host *host;
@@ -1665,12 +1676,12 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	u32 dma_chan;
 
 	/* Allocate DWC SATA device */
-	hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
-	if (hsdev == NULL) {
-		dev_err(&ofdev->dev, "kmalloc failed for hsdev\n");
-		err = -ENOMEM;
-		goto error;
-	}
+	host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS);
+	hsdev = devm_kzalloc(&ofdev->dev, sizeof(*hsdev), GFP_KERNEL);
+	if (!host || !hsdev)
+		return -ENOMEM;
+
+	host->private_data = hsdev;
 
 	if (of_property_read_u32(np, "dma-channel", &dma_chan)) {
 		dev_warn(&ofdev->dev, "no dma-channel property set."
@@ -1680,12 +1691,11 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	host_pvt.dma_channel = dma_chan;
 
 	/* Ioremap SATA registers */
-	base = of_iomap(ofdev->dev.of_node, 0);
+	base = of_iomap(np, 0);
 	if (!base) {
 		dev_err(&ofdev->dev, "ioremap failed for SATA register"
 			" address\n");
-		err = -ENODEV;
-		goto error_kmalloc;
+		return -ENODEV;
 	}
 	hsdev->reg_base = base;
 	dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n");
@@ -1693,16 +1703,6 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	/* Synopsys DWC SATA specific Registers */
 	hsdev->sata_dwc_regs = (void *__iomem)(base + SATA_DWC_REG_OFFSET);
 
-	/* Allocate and fill host */
-	host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS);
-	if (!host) {
-		dev_err(&ofdev->dev, "ata_host_alloc_pinfo failed\n");
-		err = -ENOMEM;
-		goto error_iomap;
-	}
-
-	host->private_data = hsdev;
-
 	/* Setup port */
 	host->ports[0]->ioaddr.cmd_addr = base;
 	host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET;
@@ -1716,7 +1716,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 		   idr, ver[0], ver[1], ver[2]);
 
 	/* Get SATA DMA interrupt number */
-	irq = irq_of_parse_and_map(ofdev->dev.of_node, 1);
+	irq = irq_of_parse_and_map(np, 1);
 	if (irq == NO_IRQ) {
 		dev_err(&ofdev->dev, "no SATA DMA irq\n");
 		err = -ENODEV;
@@ -1724,7 +1724,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	}
 
 	/* Get physical SATA DMA register base address */
-	host_pvt.sata_dma_regs = of_iomap(ofdev->dev.of_node, 1);
+	host_pvt.sata_dma_regs = (void *)of_iomap(np, 1);
 	if (!(host_pvt.sata_dma_regs)) {
 		dev_err(&ofdev->dev, "ioremap failed for AHBDMA register"
 			" address\n");
@@ -1744,7 +1744,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	sata_dwc_enable_interrupts(hsdev);
 
 	/* Get SATA interrupt number */
-	irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
+	irq = irq_of_parse_and_map(np, 0);
 	if (irq == NO_IRQ) {
 		dev_err(&ofdev->dev, "no SATA DMA irq\n");
 		err = -ENODEV;
@@ -1770,9 +1770,6 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	iounmap((void __iomem *)host_pvt.sata_dma_regs);
 error_iomap:
 	iounmap(base);
-error_kmalloc:
-	kfree(hsdev);
-error:
 	return err;
 }
 
@@ -1783,15 +1780,12 @@ static int sata_dwc_remove(struct platform_device *ofdev)
 	struct sata_dwc_device *hsdev = host->private_data;
 
 	ata_host_detach(host);
-	dev_set_drvdata(dev, NULL);
 
 	/* Free SATA DMA resources */
 	dma_dwc_exit(hsdev);
 
 	iounmap((void __iomem *)host_pvt.sata_dma_regs);
 	iounmap(hsdev->reg_base);
-	kfree(hsdev);
-	kfree(host);
 	dev_dbg(&ofdev->dev, "done\n");
 	return 0;
 }
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index f9a0e34eb111188ad152400a4ec733561ec755e7..f8c33e3772b823e123f4b32c2c066608297e06c2 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4185,8 +4185,7 @@ static int mv_platform_probe(struct platform_device *pdev)
 			clk_disable_unprepare(hpriv->port_clks[port]);
 			clk_put(hpriv->port_clks[port]);
 		}
-		if (hpriv->port_phys[port])
-			phy_power_off(hpriv->port_phys[port]);
+		phy_power_off(hpriv->port_phys[port]);
 	}
 
 	return rc;
@@ -4216,8 +4215,7 @@ static int mv_platform_remove(struct platform_device *pdev)
 			clk_disable_unprepare(hpriv->port_clks[port]);
 			clk_put(hpriv->port_clks[port]);
 		}
-		if (hpriv->port_phys[port])
-			phy_power_off(hpriv->port_phys[port]);
+		phy_power_off(hpriv->port_phys[port]);
 	}
 	return 0;
 }
diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index cb0d2e644af51dc187332f8a2b7ed8a98781351f..d49a5193b7de9e9438ef0f6693ca53db757e5027 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -2,8 +2,8 @@
  * Renesas R-Car SATA driver
  *
  * Author: Vladimir Barinov <source@cogentembedded.com>
- * Copyright (C) 2013 Cogent Embedded, Inc.
- * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013-2015 Cogent Embedded, Inc.
+ * Copyright (C) 2013-2015 Renesas Solutions Corp.
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
@@ -992,9 +992,30 @@ static int sata_rcar_resume(struct device *dev)
 	return 0;
 }
 
+static int sata_rcar_restore(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct sata_rcar_priv *priv = host->private_data;
+
+	clk_prepare_enable(priv->clk);
+
+	sata_rcar_setup_port(host);
+
+	/* initialize host controller */
+	sata_rcar_init_controller(host);
+
+	ata_host_resume(host);
+
+	return 0;
+}
+
 static const struct dev_pm_ops sata_rcar_pm_ops = {
 	.suspend	= sata_rcar_suspend,
 	.resume		= sata_rcar_resume,
+	.freeze		= sata_rcar_suspend,
+	.thaw		= sata_rcar_resume,
+	.poweroff	= sata_rcar_suspend,
+	.restore	= sata_rcar_restore,
 };
 #endif
 
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 642d6ae4030c289d4272d2f60285f3e1f4f55834..a270f25ee7c7c49890e2b902ceaccd80a5a05aa2 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -21,16 +21,20 @@ struct device;
 struct ata_port_info;
 struct ahci_host_priv;
 struct platform_device;
+struct scsi_host_template;
 
 int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
+int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv);
+void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv);
 int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
 struct ahci_host_priv *ahci_platform_get_resources(
 	struct platform_device *pdev);
 int ahci_platform_init_host(struct platform_device *pdev,
 			    struct ahci_host_priv *hpriv,
-			    const struct ata_port_info *pi_template);
+			    const struct ata_port_info *pi_template,
+			    struct scsi_host_template *sht);
 
 int ahci_platform_suspend_host(struct device *dev);
 int ahci_platform_resume_host(struct device *dev);
diff --git a/include/linux/ata.h b/include/linux/ata.h
index f2f4d8da97c00ed1def998c40b9642cb2d159106..1648026e06b4d1755e5fae46066e6265180829fb 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -503,7 +503,7 @@ struct ata_bmdma_prd {
 #define ata_id_has_dma(id)	((id)[ATA_ID_CAPABILITY] & (1 << 8))
 #define ata_id_has_ncq(id)	((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
 #define ata_id_queue_depth(id)	(((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
-#define ata_id_removeable(id)	((id)[ATA_ID_CONFIG] & (1 << 7))
+#define ata_id_removable(id)	((id)[ATA_ID_CONFIG] & (1 << 7))
 #define ata_id_has_atapi_AN(id)	\
 	((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
 	  ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
diff --git a/include/linux/ata_platform.h b/include/linux/ata_platform.h
index 5c618a084225ebda350e969931434b5a26846448..619d9e78e6447db2cb4df71f6464b19f07e790f0 100644
--- a/include/linux/ata_platform.h
+++ b/include/linux/ata_platform.h
@@ -10,12 +10,15 @@ struct pata_platform_info {
 	unsigned int ioport_shift;
 };
 
+struct scsi_host_template;
+
 extern int __pata_platform_probe(struct device *dev,
 				 struct resource *io_res,
 				 struct resource *ctl_res,
 				 struct resource *irq_res,
 				 unsigned int ioport_shift,
-				 int __pio_mask);
+				 int __pio_mask,
+				 struct scsi_host_template *sht);
 
 /*
  * Marvell SATA private data
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 91f705de2c0be743dac06dac565817516058fc56..61df823ac86a24efd97f6806f71f9dad1f25101a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1340,6 +1340,12 @@ extern const struct ata_port_operations ata_base_port_ops;
 extern const struct ata_port_operations sata_port_ops;
 extern struct device_attribute *ata_common_sdev_attrs[];
 
+/*
+ * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
+ * by the edge drivers.  Because the 'module' field of sht must be the
+ * edge driver's module reference, otherwise the driver can be unloaded
+ * even if the scsi_device is being accessed.
+ */
 #define ATA_BASE_SHT(drv_name)					\
 	.module			= THIS_MODULE,			\
 	.name			= drv_name,			\