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-rw-r--r--drivers/pci/msi.c5
-rw-r--r--drivers/pci/pci.h2
-rw-r--r--drivers/pci/quirks.c21
3 files changed, 26 insertions, 2 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index b5ab9aa6ff7c..2b85aa39f954 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -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)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index d94d7af4f7a0..fa36094aa0f9 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -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;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index a9160ad16581..bb36bb69803f 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -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;
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