On Mon, Jun 15, 2026 at 10:00:00AM +0800, Xixin Liu wrote:
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.
CCing Parav because he previously looked at surprise removal:
https://lore.kernel.org/virtualization/20250822091706.21170-1-parav@nvidia.com/ (local)
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