linux-kernel - [patch] PCI: modify SB700 SATA MSI quirk

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Date:	Thu, 24 Jan 2008 19:12:49 +0800
From:	"Shane Huang" <Shane.Huang@....com>
To:	gregkh@...e.de
cc:	linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz,
	htejun@...il.com, "Shane Huang" <Shane.Huang@....com>
Subject: [patch] PCI: modify SB700 SATA MSI quirk

SB700 SATA MSI bug will be fixed in SB700 revision A21 at hardware
level,
but the SB700 revision older than A21 will also be found in the market.
This patch modify the original quirk commit
bc38b411fe696fad32b261f492cb4afbf1835256 instead of withdrawing it.


Signed-off-by: Shane Huang <shane.huang@....com>


Since there is some word wrapping problem with my mail client MS
outlook, I also attach the patch as an attachment. Please check it.



diff -ruN old/drivers/pci/quirks.c new/drivers/pci/quirks.c
--- old/drivers/pci/quirks.c	2008-01-07 05:45:38.000000000 +0800
+++ new/drivers/pci/quirks.c	2008-01-22 11:31:09.000000000 +0800
@@ -1709,6 +1709,22 @@
 {
 	dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
 }
+static void __devinit quirk_msi_intx_disable_ati_bug(struct pci_dev
*dev)
+{
+	struct pci_dev *p;
+	u8 rev = 0;
+
+	/* SB700 MSI issue will be fixed at HW level from revision A21,
+	 * we need check PCI REVISION ID of SMBus controller to get
SB700 revision.
+	 */
+	p = pci_get_device(PCI_VENDOR_ID_ATI,
PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
+	if (p!=NULL) {
+		pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
+	}
+	if ((rev < 0x3B) && (rev >= 0x30)) {
+		dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
+	}
+}
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
 			PCI_DEVICE_ID_TIGON3_5780,
 			quirk_msi_intx_disable_bug);
@@ -1729,17 +1745,17 @@
 			quirk_msi_intx_disable_bug);
 
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4390,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4391,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4392,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4393,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4394,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4395,
-			quirk_msi_intx_disable_bug);
+			quirk_msi_intx_disable_ati_bug);
 
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4373,
 			quirk_msi_intx_disable_bug);


Thanks
Best Regards
Shane


Download attachment "modify_SB700_MSI_issue.patch" of type "application/octet-stream" (1787 bytes)