linux-kernel - [PATCH] quirk_vialatency: Omit reading pci revision ID

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Date:	Mon, 29 Oct 2007 14:55:02 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	gregkh@...e.de, alan@...rguk.ukuu.org.uk
Cc:	linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: [PATCH] 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: Auke Kok <auke-jan.h.kok@...el.com>
Cc: alan@...rguk.ukuu.org.uk
---

 drivers/pci/quirks.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d0bb5b9..92dc513 100644
--- a/drivers/pci/quirks.c
+++ b/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;
 	}
 	
-
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