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[PATCH] PCI: 6700/6702PXH quirk

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On the 6700/6702 PXH part, a MSI may get corrupted if an ACPI hotplug
driver and SHPC driver in MSI mode are used together.

This patch will prevent MSI from being enabled for the SHPC as part of
an early pci quirk, as well as on any pci device which sets the no_msi
bit.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kristen Accardi
2005-08-16 15:15:58 -07:00
committed by Linus Torvalds
parent 208f3d6175
commit 4602b88d97
5 changed files with 33 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/pci/msi.c
View File

@@ -453,7 +453,7 @@ static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
}
}
static void disable_msi_mode(struct pci_dev *dev, int pos, int type)
void disable_msi_mode(struct pci_dev *dev, int pos, int type)
{
u16 control;
@@ -699,6 +699,9 @@ int pci_enable_msi(struct pci_dev* dev)
if (!pci_msi_enable || !dev)
return status;
if (dev->no_msi)
return status;
temp = dev->irq;
if ((status = msi_init()) < 0)

2
drivers/pci/pci.h
View File

@@ -46,7 +46,7 @@ extern int pci_msi_quirk;
#else
#define pci_msi_quirk 0
#endif
void disable_msi_mode(struct pci_dev *dev, int pos, int type);
extern int pcie_mch_quirk;
extern struct device_attribute pci_dev_attrs[];
extern struct class_device_attribute class_device_attr_cpuaffinity;

21
drivers/pci/quirks.c
View File

@@ -1291,6 +1291,27 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quir
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_pcie_mch );
/*
* It's possible for the MSI to get corrupted if shpc and acpi
* are used together on certain PXH-based systems.
*/
static void __devinit quirk_pcie_pxh(struct pci_dev *dev)
{
disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
PCI_CAP_ID_MSI);
dev->no_msi = 1;
printk(KERN_WARNING "PCI: PXH quirk detected, "
"disabling MSI for SHPC device\n");
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_0, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_1, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_pcie_pxh);
static void __devinit quirk_netmos(struct pci_dev *dev)
{
unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;