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authorAndi Kleen <ak@suse.de>2006-04-07 19:50:15 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-09 11:53:52 -0700
commit49c93e84d8b2d602a07c302c7e3cd4fa09095fbb (patch)
treea59d0bb7a9f1df9f3187e466e3937ea9ffd83343 /arch/x86_64/pci
parent8c30b1a74aed4041f183e183a149b7dfbdc6c20e (diff)
[PATCH] i386/x86-64: Return defined error value for bad PCI config space accesses
Mostly to get better handling when a extended config space access has to fallback to Type1. Cc: gregkh@suse.de Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/pci')
-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)