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>
---
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
