[dpdk-dev] [v2] vdpa/mlx5: fix queue update synchronization

[Maxime Coquelin]

On 8/2/20 11:21 AM, Xueming Li wrote:
> The driver CQ event management is done by non vhost library thread,
> either the dpdk host thread or the internal vDPA driver thread.
> 
> When a queue is updated the CQ may be destroyed and created by the vhost
> library thread via the queue state operation.
> 
> When the queue update feature was added, it didn't synchronize the CQ
> management to the queue update what may cause invalid memory access.
> 
> Add the aforementioned synchronization by a new per device configuration
> mutex.
> 
> Fixes: c47d6e83334e ("vdpa/mlx5: support queue update")
> 
> Signed-off-by: Xueming Li <xuemingl at mellanox.com>
> Acked-by: Matan Azrad <matan at mellanox.com>
> ---
>  drivers/vdpa/mlx5/mlx5_vdpa.c       | 8 +++++++-
>  drivers/vdpa/mlx5/mlx5_vdpa.h       | 1 +
>  drivers/vdpa/mlx5/mlx5_vdpa_event.c | 8 ++++++++
>  3 files changed, 16 insertions(+), 1 deletion(-)
> 

Applied to dpdk-next-virtio/master with suggested change.

Thanks,
Maxime