Hi, This series adds proper PCI AER error recovery handling for virtio-pci and completes virtio-blk teardown when ERS reports pci_channel_io_perm_failure.
virtio-pci only registered reset_prepare/reset_done. The recovery core treats devices without error_detected as NO_AER_DRIVER and does not deliver perm_failure to the driver after a failed recovery. When bus reset fails (reproduced on QEMU with DLLLA not set within 100 ms after secondary bus reset), virtio-blk disks stay live even though virtqueues may already have been torn down during the frozen phase. Patch 1 registers error_detected (frozen quiesce + perm_failure notify). Patch 2 calls the virtio driver shutdown hook from virtio-pci on perm_failure, implements virtio-blk shutdown with blk_mark_disk_dead(), and fail-fast guards in virtio_queue_rq. Thanks, Xixin Liu --- Xixin Liu (2): virtio-pci: add error_detected for PCI AER recovery virtio-blk: mark disk dead on ERS permanent failure drivers/block/virtio_blk.c | 39 +++++++++++++++++++++++++++++++ drivers/virtio/virtio_pci_common.c | 47 ++++++++++++++++++++++++++++++++++ 2 files changed, 85 insertions(+) -- 2.43.0
