virtio: PCI ERS permanent failure teardown for virtio-blk#963
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added 2 commits
July 6, 2026 09:32
virtio-pci only registered reset_prepare/reset_done. The PCI error recovery core treats devices without error_detected as NO_AER_DRIVER and does not deliver pci_channel_io_perm_failure to the driver after a failed recovery. Virtio devices therefore miss the normal ERS quiesce/teardown sequence. Register error_detected: quiesce on frozen (reset_prepare) before bus reset; on perm_failure break virtqueues and return DISCONNECT. Block-layer cleanup for virtio-blk is handled in the follow-up patch. Signed-off-by: Xixin Liu <liuxixin@kylinos.cn>
After ERS reports pci_channel_io_perm_failure, virtio-pci must ask the virtio driver to tear down the block device — not only mark virtqueues broken. Call the virtio driver shutdown hook from virtio-pci on perm_failure; virtio-blk implements shutdown with blk_mark_disk_dead(). Fail new requests early in virtio_queue_rq when the disk is dead or virtqueues were removed during frozen reset_prepare. Signed-off-by: Xixin Liu <liuxixin@kylinos.cn>
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Pull request for series with
subject: virtio: PCI ERS permanent failure teardown for virtio-blk
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1111568