1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 6a3bfef58e13..2610db75f984 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -928,20 +928,18 @@ static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev)
 {
         struct pci_dev *pdev = NULL;
         u16 cfg;
-        u8 rev;
         int no_piix_dma = 0;
 
         while((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL)
         {
                 /* Look for 450NX PXB. Check for problem configurations
                    A PCI quirk checks bit 6 already */
-                pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
                 pci_read_config_word(pdev, 0x41, &cfg);
                 /* Only on the original revision: IDE DMA can hang */
-                if (rev == 0x00)
+                if (pdev->revision == 0x00)
                         no_piix_dma = 1;
                 /* On all revisions below 5 PXB bus lock must be disabled for IDE */
-                else if (cfg & (1<<14) && rev < 5)
+                else if (cfg & (1<<14) && pdev->revision < 5)
                         no_piix_dma = 2;
         }
         if (no_piix_dma)