Commit cf34a8e0 authored by Brice Goglin's avatar Brice Goglin Committed by Greg Kroah-Hartman
Browse files

[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: default avatarBrice Goglin <brice@myri.com>
Signed-off-by: default avatarLoic Prylli <loic@myri.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ead2bfeb

drivers/pci/quirks.c

+19 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/pci_ids.h

+1 −0
Original line number Diff line number Diff line
@@ -1023,6 +1023,7 @@ 
#define PCI_DEVICE_ID_NVIDIA_NVENET_8		0x0056

#define PCI_DEVICE_ID_NVIDIA_NVENET_9		0x0057

#define PCI_DEVICE_ID_NVIDIA_CK804_AUDIO	0x0059

#define PCI_DEVICE_ID_NVIDIA_CK804_PCIE		0x005d

#define PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS	0x0064

#define PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE	0x0065

#define PCI_DEVICE_ID_NVIDIA_NVENET_2		0x0066

CRA Git | Maintained and supported by SUSTech CRA and CCSE