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authorChris Wright <chrisw@sous-sol.org>2011-07-13 10:14:33 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-07-22 08:41:51 -0700
commit864d296cf948aef0fa32b81407541572583f7572 (patch)
tree67d2cee99f6a5f591bcd6a19bb5333f6c4234598 /virt
parenta8c7ef3187a266d201af887fd48afbef3598825a (diff)
downloadop-kernel-dev-864d296cf948aef0fa32b81407541572583f7572.zip
op-kernel-dev-864d296cf948aef0fa32b81407541572583f7572.tar.gz
PCI: ARI is a PCIe v2 feature
The function pci_enable_ari() may mistakenly set the downstream port of a v1 PCIe switch in ARI Forwarding mode. This is a PCIe v2 feature, and with an SR-IOV device on that switch port believing the switch above is ARI capable it may attempt to use functions 8-255, translating into invalid (non-zero) device numbers for that bus. This has been seen to cause Completion Timeouts and general misbehaviour including hangs and panics. Cc: stable@kernel.org Acked-by: Don Dutile <ddutile@redhat.com> Tested-by: Don Dutile <ddutile@redhat.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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