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| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-10-04 16:14:30 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-10-04 16:15:29 -0600 |
| commit | 67d470e0e1711ca4a4c3a0e5524e0d580654053e (patch) | |
| tree | 51d9ecc81b899de30efd0e205e0efd835a48f90b /arch/x86/pci | |
| parent | 4a10c2ac2f368583138b774ca41fac4207911983 (diff) | |
| download | linux-67d470e0e1711ca4a4c3a0e5524e0d580654053e.tar.gz linux-67d470e0e1711ca4a4c3a0e5524e0d580654053e.tar.bz2 linux-67d470e0e1711ca4a4c3a0e5524e0d580654053e.zip | |
Revert "x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero"
This reverts commit 07f9b61c3915e8eb156cb4461b3946736356ad02.
07f9b61c was intended to be a cleanup that didn't change anything, but in
fact, for systems without _CBA (which is almost everything), it broke
extended config space for domain 0 and all config space for other domains.
Reference: http://lkml.kernel.org/r/20131004011806.GE20450@dangermouse.emea.sgi.com
Reported-by: Hedi Berriche <hedi@sgi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/mmconfig-shared.c | 7 |
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) { |