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accel/amdxdna: Replace mmput with mmput_async to avoid dead lock

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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: aac243092b ("accel/amdxdna: Add command execution")
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206220001.164049-3-lizhi.hou@amd.com
This commit is contained in:
Lizhi Hou
2024-12-06 13:59:55 -08:00
committed by Jeffrey Hugo
parent c3772d6c04
commit cfc722fc1c
1 changed files with 1 additions and 1 deletions
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2
drivers/accel/amdxdna/aie2_ctx.c
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@@ -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);
}