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PCI: populate subsystem vendor and device IDs for PCI bridges 

Change to populate the subsystem vendor and subsytem device IDs for
PCI-PCI bridges that implement the PCI Subsystem Vendor ID capability.
Previously bridges left subsystem vendor IDs unpopulated.

Signed-off-by: Gabe Black <gabe.black@ni.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
hifive-unleashed-5.1
Gabe Black 2009-10-06 10:45:19 -05:00 committed by Jesse Barnes
parent 0584396157
commit bc577d2bb9
2 changed files with 11 additions and 0 deletions
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6
drivers/pci/probe.c
View File

@ -730,6 +730,7 @@ int pci_setup_device(struct pci_dev *dev)
u32 class;
u8 hdr_type;
struct pci_slot *slot;
int pos = 0;
if (pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type))
return -EIO;
@ -822,6 +823,11 @@ int pci_setup_device(struct pci_dev *dev)
dev->transparent = ((dev->class & 0xff) == 1);
pci_read_bases(dev, 2, PCI_ROM_ADDRESS1);
set_pcie_hotplug_bridge(dev);
pos = pci_find_capability(dev, PCI_CAP_ID_SSVID);
if (pos) {
pci_read_config_word(dev, pos + PCI_SSVID_VENDOR_ID, &dev->subsystem_vendor);
pci_read_config_word(dev, pos + PCI_SSVID_DEVICE_ID, &dev->subsystem_device);
}
break;
case PCI_HEADER_TYPE_CARDBUS: /* CardBus bridge header */

5
include/linux/pci_regs.h
View File

@ -365,6 +365,11 @@
#define PCI_X_STATUS_266MHZ 0x40000000 /* 266 MHz capable */
#define PCI_X_STATUS_533MHZ 0x80000000 /* 533 MHz capable */
/* PCI Bridge Subsystem ID registers */
#define PCI_SSVID_VENDOR_ID 4 /* PCI-Bridge subsystem vendor id register */
#define PCI_SSVID_DEVICE_ID 6 /* PCI-Bridge subsystem device id register */
/* PCI Express capability registers */
#define PCI_EXP_FLAGS 2 /* Capabilities register */