diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 30c4276..0104367 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -455,23 +455,21 @@
 
 static void ali_init_chipset(struct pci_dev *pdev)
 {
-	u8 rev, tmp;
+	u8 tmp;
 	struct pci_dev *north, *isa_bridge;
 
-	pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
-
 	/*
 	 * The chipset revision selects the driver operations and
 	 * mode data.
 	 */
 
-	if (rev >= 0x20 && rev < 0xC2) {
+	if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 		/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
 		pci_read_config_byte(pdev, 0x4B, &tmp);
 		/* Clear CD-ROM DMA write bit */
 		tmp &= 0x7F;
 		pci_write_config_byte(pdev, 0x4B, tmp);
-	} else if (rev >= 0xC2) {
+	} else if (pdev->revision >= 0xC2) {
 		/* Enable cable detection logic */
 		pci_read_config_byte(pdev, 0x4B, &tmp);
 		pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
@@ -483,21 +481,21 @@
 		/* Configure the ALi bridge logic. For non ALi rely on BIOS.
 		   Set the south bridge enable bit */
 		pci_read_config_byte(isa_bridge, 0x79, &tmp);
-		if (rev == 0xC2)
+		if (pdev->revision == 0xC2)
 			pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
-		else if (rev > 0xC2 && rev < 0xC5)
+		else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
 			pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
 	}
-	if (rev >= 0x20) {
+	if (pdev->revision >= 0x20) {
 		/*
 		 * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
 		 * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
 		 * via 0x54/55.
 		 */
 		pci_read_config_byte(pdev, 0x53, &tmp);
-		if (rev <= 0x20)
+		if (pdev->revision <= 0x20)
 			tmp &= ~0x02;
-		if (rev >= 0xc7)
+		if (pdev->revision >= 0xc7)
 			tmp |= 0x03;
 		else
 			tmp |= 0x01;	/* CD_ROM enable for DMA */
@@ -579,25 +577,23 @@
 	};
 
 	const struct ata_port_info *ppi[] = { NULL, NULL };
-	u8 rev, tmp;
+	u8 tmp;
 	struct pci_dev *isa_bridge;
 
-	pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
-
 	/*
 	 * The chipset revision selects the driver operations and
 	 * mode data.
 	 */
 
-	if (rev < 0x20) {
+	if (pdev->revision < 0x20) {
 		ppi[0] = &info_early;
-	} else if (rev < 0xC2) {
+	} else if (pdev->revision < 0xC2) {
         	ppi[0] = &info_20;
-	} else if (rev == 0xC2) {
+	} else if (pdev->revision == 0xC2) {
         	ppi[0] = &info_c2;
-	} else if (rev == 0xC3) {
+	} else if (pdev->revision == 0xC3) {
         	ppi[0] = &info_c3;
-	} else if (rev == 0xC4) {
+	} else if (pdev->revision == 0xC4) {
         	ppi[0] = &info_c4;
 	} else
         	ppi[0] = &info_c5;
@@ -605,7 +601,7 @@
 	ali_init_chipset(pdev);
 
 	isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
-	if (isa_bridge && rev >= 0x20 && rev < 0xC2) {
+	if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
 		/* Are we paired with a UDMA capable chip */
 		pci_read_config_byte(isa_bridge, 0x5E, &tmp);
 		if ((tmp & 0x1E) == 0x12)