Commit cfc722fc authored by Lizhi Hou's avatar Lizhi Hou Committed by Jeff Hugo
Browse files

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



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: aac24309 ("accel/amdxdna: Add command execution")
Signed-off-by: default avatarLizhi Hou <lizhi.hou@amd.com>
Reviewed-by: default avatarJeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: default avatarJeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206220001.164049-3-lizhi.hou@amd.com
parent c3772d6c

drivers/accel/amdxdna/aie2_ctx.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

}