* Jesse Barnes (jbarnes@xxxxxxxxxxxxxxxx) wrote: > On Wed, 13 Jul 2011 10:14:33 -0700 > Chris Wright <chrisw@xxxxxxxxxxxx> wrote: > > > 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. > > Thanks Chris, your earlier one is still sitting in my queue, but I > wasn't going to send it for 3.0 as it didn't seem that critical. Do > you think it is? If so you can send it directly to Linus with my ack > as I don't have anything else queued, or just wait until the merge > window when it will be put into the stable tree as well. Cool, just wanted to make sure it wasn't lost. I think it's fine to merge in next window and let it filter back to -stable. While I've seen it cause panics, it's not a regression and the conditions required are very specific (possibly including buggy BIOS). thanks, -chris -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
