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authorLinus Torvalds <torvalds@linux-foundation.org>2013-10-04 20:48:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-10-04 20:48:20 -0700
commit95167aad6761ec8a0fc76506ed00439483208ee1 (patch)
tree9cf2386d9fc97585a76a15e826954ee5468ff2f7
parent7dee8dff47734ee52da2cd8b8ea9736e42c5062f (diff)
parent67d470e0e1711ca4a4c3a0e5524e0d580654053e (diff)
downloadlinux-stericsson-95167aad6761ec8a0fc76506ed00439483208ee1.tar.gz
Merge tag 'pci-v3.12-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fix from Bjorn Helgaas: "We merged what was intended to be an MMCONFIG cleanup, but in fact, for systems without _CBA (which is almost everything), it broke extended config space for domain 0 and it broke all config space for other domains. This reverts the change" * tag 'pci-v3.12-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: Revert "x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero"
-rw-r--r--arch/x86/pci/mmconfig-shared.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 5596c7bdd327..082e88129712 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -700,7 +700,7 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
if (!(pci_probe & PCI_PROBE_MMCONF) || pci_mmcfg_arch_init_failed)
return -ENODEV;
- if (start > end || !addr)
+ if (start > end)
return -EINVAL;
mutex_lock(&pci_mmcfg_lock);
@@ -716,6 +716,11 @@ int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
return -EEXIST;
}
+ if (!addr) {
+ mutex_unlock(&pci_mmcfg_lock);
+ return -EINVAL;
+ }
+
rc = -EBUSY;
cfg = pci_mmconfig_alloc(seg, start, end, addr);
if (cfg == NULL) {