On Thu, Jul 01, 2021 at 02:38:56PM -0500, Bjorn Helgaas wrote: > On Fri, Apr 30, 2021 at 06:01:19PM -0500, Robert Straw wrote: > > The SM951/PM951, when used in conjunction with the vfio-pci driver and > > passed to a KVM guest, can exhibit the fatal state addressed by the > > existing `nvme_disable_and_flr` quirk. If the guest cleanly shuts down > > the SSD, and vfio-pci attempts an FLR to the device while it is in this > > state, the nvme driver will fail when it attempts to bind to the device > > after the FLR due to the frozen config area, e.g: > > > > nvme nvme2: frozen state error detected, reset controller > > nvme nvme2: Removing after probe failure status: -12 > > > > By including this older model (Samsung 950 PRO) of the controller in the > > existing quirk: the device is able to be cleanly reset after being used > > by a KVM guest. > > > > Signed-off-by: Robert Straw <drbawb@xxxxxxxxxxxxxxx> > > Applied to pci/virtualization for v5.14, thanks! FYI, I really do not like the idea of the PCIe core messing with NVMe registers like this.
