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Diffstat (limited to 'arch/x86_64/pci/mmconfig.c')
-rw-r--r--arch/x86_64/pci/mmconfig.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index d4e25f38287..b493ed977e7 100644
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -75,8 +75,10 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
char __iomem *addr;
/* Why do we have this when nobody checks it. How about a BUG()!? -AK */
- if (unlikely(!value || (bus > 255) || (devfn > 255) || (reg > 4095)))
+ if (unlikely(!value || (bus > 255) || (devfn > 255) || (reg > 4095))) {
+ *value = -1;
return -EINVAL;
+ }
addr = pci_dev_base(seg, bus, devfn);
if (!addr)