Use VENDOR_ID instead of CLASS_REVISION.
Do have one system with 0x00ffffff CLASS_REVSION
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
arch/x86/pci/early.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
Index: linux-2.6/arch/x86/pci/early.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/early.c
+++ linux-2.6/arch/x86/pci/early.c
@@ -88,12 +88,17 @@ void early_dump_pci_devices(void)
for (bus = 0; bus < 256; bus++) {
for (slot = 0; slot < 32; slot++) {
for (func = 0; func < 8; func++) {
- u32 class;
+ u32 l;
u8 type;
- class = read_pci_config(bus, slot, func,
- PCI_CLASS_REVISION);
- if (class == 0xffffffff)
+ l = read_pci_config(bus, slot, func,
+ PCI_VENDOR_ID);
+ /*
+ * some broken boards return 0 or ~0 if a slot
+ * is empty
+ */
+ if (l == 0xffffffff || l == 0x00000000 ||
+ l == 0x0000ffff || l == 0xffff0000)
continue;
early_dump_pci_device(bus, slot, func);
--
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