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authorBrice Goglin <brice@myri.com>2006-06-13 14:35:42 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 12:00:01 -0700
commitcf34a8e07f02c76f3f1232eecb681301a3d7b10b (patch)
tree9148713707b7b5f50bfeceeaefb78d87474a106b /drivers/pci/quirks.c
parentead2bfeb7f739d2ad6e09dc1343f0da51feb7f51 (diff)
[PATCH] PCI: nVidia quirk to make AER PCI-E extended capability visible
The nVidia CK804 PCI-E chipset supports the AER extended capability but sometimes fails to link it (with some BIOS or after a warm reboot). It makes the AER cap invisible to pci_find_ext_capability(). The patch adds a quirk to set the missing bit that controls the linking of the capability. By the way, it removes the corresponding code in the myri10ge driver. Signed-off-by: Brice Goglin <brice@myri.com> Signed-off-by: Loic Prylli <loic@myri.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index aea4d49bcce..4364d793f73 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);