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-rw-r--r--src/devices/pci_device.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/src/devices/pci_device.c b/src/devices/pci_device.c
index fbe8b335af..b85ee53a72 100644
--- a/src/devices/pci_device.c
+++ b/src/devices/pci_device.c
@@ -910,10 +910,14 @@ device_t pci_probe_dev(device_t dev, struct bus * bus, unsigned devfn)
dummy.path.pci.devfn = devfn;
id = pci_read_config32(&dummy, PCI_VENDOR_ID);
/* Have we found something?
- * Some broken boards return 0 if a slot is empty.
+ * Some broken boards return 0 if a slot is empty, but
+ * the expected answer is 0xffffffff
*/
- if ((id == 0xffffffff) || (id == 0x00000000) ||
- (id == 0x0000ffff) || (id == 0xffff0000)) {
+ if (id == 0xffffffff) {
+ return NULL;
+ }
+ if ((id == 0x00000000) || (id == 0x0000ffff) ||
+ (id == 0xffff0000)) {
printk(BIOS_SPEW, "%s, bad id 0x%x\n", dev_path(&dummy), id);
return NULL;
}