Re: [PATCH V2 2/8] accel/amdxdna: Replace mmput with mmput_async to avoid dead lock

[Jeffrey Hugo]

On 12/6/2024 2:59 PM, Lizhi Hou wrote:
> Hardware mailbox message receiving handler calls mmput to release the
> process mm. If the process has already exited, the mmput here may call mmu
> notifier handler, amdxdna_hmm_invalidate, which will cause a dead lock.
> Using mmput_async instead prevents this dead lock.
>
> Fixes: aac243092b70 ("accel/amdxdna: Add command execution")
> Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxx>

Reviewed-by: Jeffrey Hugo <quic_jhugo@xxxxxxxxxxx>