Re: [PATCH 2/2] virtio_blk: Add support for transport error recovery

[Stefan Hajnoczi <stefanha@redhat.com>]

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On Wed, Nov 27, 2024 at 08:57:32AM +0200, Israel Rukshin wrote:
> Add support for proper cleanup and re-initialization of virtio-blk devices
> during transport reset error recovery flow.
> This enhancement includes:
> - Pre-reset handler (reset_prepare) to perform device-specific cleanup
> - Post-reset handler (reset_done) to re-initialize the device
> 
> These changes allow the device to recover from various reset scenarios,
> ensuring proper functionality after a reset event occurs.
> Without this implementation, the device cannot properly recover from
> resets, potentially leading to undefined behavior or device malfunction.
> 
> This feature has been tested using PCI transport with Function Level
> Reset (FLR) as an example reset mechanism. The reset can be triggered
> manually via sysfs (echo 1 > /sys/bus/pci/devices/$PCI_ADDR/reset).
> 
> Signed-off-by: Israel Rukshin <israelr@nvidia.com>
> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
> ---
>  drivers/block/virtio_blk.c | 28 +++++++++++++++++++++++++---
>  1 file changed, 25 insertions(+), 3 deletions(-)

Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

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