1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index aea4d49bcce3..4364d793f73b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1499,6 +1499,25 @@ static void __devinit quirk_p64h2_1k_io(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   0x1460,         quirk_p64h2_1k_io);
 
+/* Under some circumstances, AER is not linked with extended capabilities.
+ * Force it to be linked by setting the corresponding control bit in the
+ * config space.
+ */
+static void __devinit quirk_nvidia_ck804_pcie_aer_ext_cap(struct pci_dev *dev)
+{
+        uint8_t b;
+        if (pci_read_config_byte(dev, 0xf41, &b) == 0) {
+                if (!(b & 0x20)) {
+                        pci_write_config_byte(dev, 0xf41, b | 0x20);
+                        printk(KERN_INFO
+                               "PCI: Linking AER extended capability on %s\n",
+                               pci_name(dev));
+                }
+        }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA,  PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
+                        quirk_nvidia_ck804_pcie_aer_ext_cap);
+
 EXPORT_SYMBOL(pcie_mch_quirk);
 #ifdef CONFIG_HOTPLUG
 EXPORT_SYMBOL(pci_fixup_device);