PCI: quirk_vialatency: Omit reading pci revision ID

Don't read the revision ID unnecessary since the PCI subsystem
fills this field in already.

Updated to fix a thinko bug in a previously sent patch.
Signed-off-by: NAuke Kok <auke-jan.h.kok@intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/pci/quirks.c

@@ -139,25 +139,22 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 	PCI_DEVICE_ID_INTEL_82439TX, 	quir
 static void quirk_vialatency(struct pci_dev *dev)
 {
 	struct pci_dev *p;
-	u8 rev;
 	u8 busarb;
 	/* Ok we have a potential problem chipset here. Now see if we have
 	   a buggy southbridge */
 	   
 	p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
 	if (p!=NULL) {
-		pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
 		/* 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A; thanks Dan Hollis */
 		/* Check for buggy part revisions */
-		if (rev < 0x40 || rev > 0x42)
+		if (p->revision < 0x40 || p->revision > 0x42)
 			goto exit;
 	} else {
 		p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
 		if (p==NULL)	/* No problem parts */
 			goto exit;
-		pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
 		/* Check for buggy part revisions */
-		if (rev < 0x10 || rev > 0x12) 
+		if (p->revision < 0x10 || p->revision > 0x12)
 			goto exit;
 	}