diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index e7ad13d43c9feab0065501d558838a64e6da7064..2b998b3218812e21aa4ca654ebbb1f22e0dd37ee 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1792,7 +1792,7 @@ int ata_dev_configure(struct ata_device *dev)
 		dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY;
 
 	if (ap->ops->dev_config)
-		ap->ops->dev_config(ap, dev);
+		ap->ops->dev_config(dev);
 
 	if (ata_msg_probe(ap))
 		ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 11ea552a58cac00507f7853e1e53a598ec5afe41..76243400c01d8289e284c14e513a2e82e0013d45 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -324,7 +324,7 @@ static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  *	slower PIO methods
  */
 
-static void ali_lock_sectors(struct ata_port *ap, struct ata_device *adev)
+static void ali_lock_sectors(struct ata_device *adev)
 {
 	adev->max_sectors = 255;
 }
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 35ecb2ba067b8b09453d0236071c4bde42a51214..be8c9ef8d0d4847b712485737174af20465012d0 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -520,7 +520,6 @@ static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused
 
 /**
  *	it821x_dev_config	-	Called each device identify
- *	@ap: ATA port
  *	@adev: Device that has just been identified
  *
  *	Perform the initial setup needed for each device that is chip
@@ -531,7 +530,7 @@ static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused
  *	basically we need to filter commands for this chip.
  */
 
-static void it821x_dev_config(struct ata_port *ap, struct ata_device *adev)
+static void it821x_dev_config(struct ata_device *adev)
 {
 	unsigned char model_num[ATA_ID_PROD_LEN + 1];
 
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 0a149339891395d6264f7c3f1b01be7dde85cb84..a764ce8252aaff75584030a56a1f541a096cb7a0 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -244,7 +244,6 @@ static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
 
 /**
  *	pdc2026x_dev_config	-	device setup hook
- *	@ap: ATA port
  *	@adev: newly found device
  *
  *	Perform chip specific early setup. We need to lock the transfer
@@ -252,7 +251,7 @@ static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
  *	barf.
  */
 
-static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
+static void pdc2026x_dev_config(struct ata_device *adev)
 {
 	adev->max_sectors = 256;
 }
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 1e21688bfcf2f4992fd493de5299e5beb679b7c7..4f5a6a1fb0edb87452e8f3eff098d21f7745bf73 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -492,7 +492,7 @@ static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
 		inic_reset_port(inic_port_base(qc->ap));
 }
 
-static void inic_dev_config(struct ata_port *ap, struct ata_device *dev)
+static void inic_dev_config(struct ata_device *dev)
 {
 	/* inic can only handle upto LBA28 max sectors */
 	if (dev->max_sectors > ATA_MAX_SECTORS)
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 917b7ea4ef7c203b0bd4ebc5abd83aad5ceb4420..170d36e6260f57cd1e9ed3b67c8bea36ada09ae6 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -114,7 +114,7 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 #ifdef CONFIG_PM
 static int sil_pci_device_resume(struct pci_dev *pdev);
 #endif
-static void sil_dev_config(struct ata_port *ap, struct ata_device *dev);
+static void sil_dev_config(struct ata_device *dev);
 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 static void sil_post_set_mode (struct ata_port *ap);
@@ -521,7 +521,6 @@ static void sil_thaw(struct ata_port *ap)
 
 /**
  *	sil_dev_config - Apply device/host-specific errata fixups
- *	@ap: Port containing device to be examined
  *	@dev: Device to be examined
  *
  *	After the IDENTIFY [PACKET] DEVICE step is complete, and a
@@ -548,8 +547,9 @@ static void sil_thaw(struct ata_port *ap)
  *	appreciated.
  *	- But then again UDMA5 is hardly anything to complain about
  */
-static void sil_dev_config(struct ata_port *ap, struct ata_device *dev)
+static void sil_dev_config(struct ata_device *dev)
 {
+	struct ata_port *ap = dev->ap;
 	int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
 	unsigned int n, quirks = 0;
 	unsigned char model_num[ATA_ID_PROD_LEN + 1];
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 5614df8c1ce2809bed166aa3b0f70d63e112819f..6698c746e624b63023f18a7586cc43e66652af04 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -323,7 +323,7 @@ struct sil24_port_priv {
 	struct ata_taskfile tf;			/* Cached taskfile registers */
 };
 
-static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev);
+static void sil24_dev_config(struct ata_device *dev);
 static u8 sil24_check_status(struct ata_port *ap);
 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
@@ -462,9 +462,9 @@ static int sil24_tag(int tag)
 	return tag;
 }
 
-static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev)
+static void sil24_dev_config(struct ata_device *dev)
 {
-	void __iomem *port = ap->ioaddr.cmd_addr;
+	void __iomem *port = dev->ap->ioaddr.cmd_addr;
 
 	if (dev->cdb_len == 16)
 		writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index a41749820964d0c873875ee684582a0efa20ccd2..84787cad860de775d58cc575e205fa0db732bf4d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -597,7 +597,7 @@ struct ata_port {
 struct ata_port_operations {
 	void (*port_disable) (struct ata_port *);
 
-	void (*dev_config) (struct ata_port *, struct ata_device *);
+	void (*dev_config) (struct ata_device *);
 
 	void (*set_piomode) (struct ata_port *, struct ata_device *);
 	void (*set_dmamode) (struct ata_port *, struct ata_device *);