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. Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxx> --- drivers/accel/amdxdna/aie2_ctx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/accel/amdxdna/aie2_ctx.c b/drivers/accel/amdxdna/aie2_ctx.c index 90e8d87666a9..b5282555bbf2 100644 --- a/drivers/accel/amdxdna/aie2_ctx.c +++ b/drivers/accel/amdxdna/aie2_ctx.c @@ -179,7 +179,7 @@ aie2_sched_notify(struct amdxdna_sched_job *job) up(&job->hwctx->priv->job_sem); job->job_done = true; dma_fence_put(fence); - mmput(job->mm); + mmput_async(job->mm); aie2_job_put(job); } -- 2.34.1
