[dpdk-stable] [PATCH v2 2/2] vdpa/mlx5: retry VAR allocation during vDPA restart

[Maxime Coquelin]

On 10/15/21 17:05, Xueming Li wrote:
> VAR is the device memory space for the virtio queues doorbells, qemu
> could mmap it to directly to speed up doorbell push.
> 
> On a busy system, Qemu takes time to release VAR resources during driver
> shutdown. If vdpa restarted quickly, the VAR allocation failed with
> error 28 since the VAR is singleton resource per device.
> 
> This patch adds retry mechanism for VAR allocation.
> 
> Fixes: 4cae722c1b06 ("vdpa/mlx5: move virtual doorbell alloc to probe")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Xueming Li <xuemingl at nvidia.com>
> Reviewed-by: Matan Azrad <matan at nvidia.com>
> ---
>   drivers/vdpa/mlx5/mlx5_vdpa.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)


Applied to dpdk-next-virtio/main.

Thanks,
Maxime