[+cc linux-pci, NVMe folks, power management folks] On Sun, Feb 7, 2016 at 11:04 AM, <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx> wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=112121 > > Bug ID: 112121 > Summary: Some PCIe options cause devices to be removed after > syspend > Product: Drivers > Version: 2.5 > Kernel Version: 4.5-rc2 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: PCI > Assignee: drivers_pci@xxxxxxxxxxxxxxxxxxxx > Reporter: mike@xxxxxxxxxxxxxx > Regression: No > > Created attachment 203091 > --> https://bugzilla.kernel.org/attachment.cgi?id=203091&action=edit > Dmesg showing PCIe device removals > > I was having issues with suspend, when the machine was being resumed iommu > started removing devices - including my PCIe NVMe drive which contained my root > partition > > The problem showed up with: > > [*] PCI support > [*] Support mmconfig PCI config space access > [*] PCI Express Port Bus support > [*] PCI Express Hotplug driver > [*] Root Port Advanced Error Reporting support > [*] PCI Express ECRC settings control > < > PCIe AER error injector support > -*- PCI Express ASPM control > [ ] Debug PCI Express ASPM > Default ASPM policy (BIOS default) ---> > [*] Message Signaled Interrupts (MSI and MSI-X) > [ ] PCI Debugging > [*] Enable PCI resource re-allocation detection > < > PCI Stub driver > [*] Interrupts on hypertransport devices > [ ] PCI IOV support > [*] PCI PRI support > -*- PCI PASID support > PCI host controller drivers ---- > < > PCCard (PCMCIA/CardBus) support ---- > [*] Support for PCI Hotplug ---> > < > RapidIO support > > > This is what I have now: > > [*] PCI support > [*] Support mmconfig PCI config space access > [*] PCI Express Port Bus support > [ ] Root Port Advanced Error Reporting support > -*- PCI Express ASPM control > [ ] Debug PCI Express ASPM > Default ASPM policy (BIOS default) ---> > [*] Message Signaled Interrupts (MSI and MSI-X) > [*] PCI Debugging > [ ] Enable PCI resource re-allocation detection > < > PCI Stub driver > [*] Interrupts on hypertransport devices > [ ] PCI IOV support > [ ] PCI PRI support > [ ] PCI PASID support > PCI host controller drivers ---- > < > PCCard (PCMCIA/CardBus) support ---- > [ ] Support for PCI Hotplug ---- > < > RapidIO support > > I tried disabling the iommu driver first but it had no effect > > If people are interested I could play with the above options to see which one > causes the issue My guess is that PCI hotplug is the important one. It would be nice if dmesg contained enough information to connect nvme0n1 to a PCI device. It'd be even nicer if the PCI core noted device removals or whatever happened here. You don't get any more details if you boot with "ignore_loglevel", do you? Mike, you didn't mark this as a regression, so I assume it's always been this way, and we just haven't noticed it because most people enable PCI hotplug (or whatever the relevant config option is). Bjorn -- 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
