diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 90ac33a7bdc71aa4994dee94ca65358e175e9d60..7bf238638e8eb7b1d22c8406f953d031923fed9d 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -101,13 +101,13 @@ enum {
 	ICH5_PCS		= 0x92,	/* port control and status */
 	PIIX_SCC		= 0x0A, /* sub-class code register */
 
-	PIIX_FLAG_IGNORE_PCS	= (1 << 25), /* ignore PCS present bits */
 	PIIX_FLAG_SCR		= (1 << 26), /* SCR available */
 	PIIX_FLAG_AHCI		= (1 << 27), /* AHCI possible */
 	PIIX_FLAG_CHECKINTR	= (1 << 28), /* make sure PCI INTx enabled */
 
-	PIIX_PATA_FLAGS		= ATA_FLAG_SLAVE_POSS,
-	PIIX_SATA_FLAGS		= ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
+	PIIX_PATA_FLAGS		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_DETECT_POLLING,
+	PIIX_SATA_FLAGS		= ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR |
+				  ATA_FLAG_DETECT_POLLING,
 
 	/* combined mode.  if set, PATA is channel 0.
 	 * if clear, PATA is channel 1.
@@ -490,7 +490,7 @@ static struct ata_port_info piix_port_info[] = {
 	/* ich5_sata: 5 */
 	{
 		.sht		= &piix_sht,
-		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_IGNORE_PCS,
+		.flags		= PIIX_SATA_FLAGS,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */
@@ -500,7 +500,7 @@ static struct ata_port_info piix_port_info[] = {
 	/* i6300esb_sata: 6 */
 	{
 		.sht		= &piix_sht,
-		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_IGNORE_PCS,
+		.flags		= PIIX_SATA_FLAGS,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */
@@ -563,11 +563,6 @@ MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
 MODULE_VERSION(DRV_VERSION);
 
-static int force_pcs = 0;
-module_param(force_pcs, int, 0444);
-MODULE_PARM_DESC(force_pcs, "force honoring or ignoring PCS to work around "
-		 "device mis-detection (0=default, 1=ignore PCS, 2=honor PCS)");
-
 struct ich_laptop {
 	u16 device;
 	u16 subvendor;
@@ -685,84 +680,9 @@ static void ich_pata_error_handler(struct ata_port *ap)
 			   ata_std_postreset);
 }
 
-/**
- *	piix_sata_present_mask - determine present mask for SATA host controller
- *	@ap: Target port
- *
- *	Reads SATA PCI device's PCI config register Port Configuration
- *	and Status (PCS) to determine port and device availability.
- *
- *	LOCKING:
- *	None (inherited from caller).
- *
- *	RETURNS:
- *	determined present_mask
- */
-static unsigned int piix_sata_present_mask(struct ata_port *ap)
-{
-	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
-	struct piix_host_priv *hpriv = ap->host->private_data;
-	const unsigned int *map = hpriv->map;
-	int base = 2 * ap->port_no;
-	unsigned int present_mask = 0;
-	int port, i;
-	u16 pcs;
-
-	pci_read_config_word(pdev, ICH5_PCS, &pcs);
-	DPRINTK("ata%u: ENTER, pcs=0x%x base=%d\n", ap->id, pcs, base);
-
-	for (i = 0; i < 2; i++) {
-		port = map[base + i];
-		if (port < 0)
-			continue;
-		if ((ap->flags & PIIX_FLAG_IGNORE_PCS) ||
-		    (pcs & 1 << (hpriv->map_db->present_shift + port)))
-			present_mask |= 1 << i;
-	}
-
-	DPRINTK("ata%u: LEAVE, pcs=0x%x present_mask=0x%x\n",
-		ap->id, pcs, present_mask);
-
-	return present_mask;
-}
-
-/**
- *	piix_sata_softreset - reset SATA host port via ATA SRST
- *	@ap: port to reset
- *	@classes: resulting classes of attached devices
- *
- *	Reset SATA host port via ATA SRST.  On controllers with
- *	reliable PCS present bits, the bits are used to determine
- *	device presence.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep)
- *
- *	RETURNS:
- *	0 on success, -errno otherwise.
- */
-static int piix_sata_softreset(struct ata_port *ap, unsigned int *classes)
-{
-	unsigned int present_mask;
-	int i, rc;
-
-	present_mask = piix_sata_present_mask(ap);
-
-	rc = ata_std_softreset(ap, classes);
-	if (rc)
-		return rc;
-
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		if (!(present_mask & (1 << i)))
-			classes[i] = ATA_DEV_NONE;
-	}
-
-	return 0;
-}
-
 static void piix_sata_error_handler(struct ata_port *ap)
 {
-	ata_bmdma_drive_eh(ap, ata_std_prereset, piix_sata_softreset, NULL,
+	ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
 			   ata_std_postreset);
 }
 
@@ -1077,18 +997,6 @@ static void __devinit piix_init_pcs(struct pci_dev *pdev,
 		pci_write_config_word(pdev, ICH5_PCS, new_pcs);
 		msleep(150);
 	}
-
-	if (force_pcs == 1) {
-		dev_printk(KERN_INFO, &pdev->dev,
-			   "force ignoring PCS (0x%x)\n", new_pcs);
-		pinfo[0].flags |= PIIX_FLAG_IGNORE_PCS;
-		pinfo[1].flags |= PIIX_FLAG_IGNORE_PCS;
-	} else if (force_pcs == 2) {
-		dev_printk(KERN_INFO, &pdev->dev,
-			   "force honoring PCS (0x%x)\n", new_pcs);
-		pinfo[0].flags &= ~PIIX_FLAG_IGNORE_PCS;
-		pinfo[1].flags &= ~PIIX_FLAG_IGNORE_PCS;
-	}
 }
 
 static void __devinit piix_init_sata_map(struct pci_dev *pdev,