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drm/msm: make sure to not queue up recovery more than once

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[ Upstream commit 10fb1b2fca ]

If two fault IRQs arrive in short succession recovery work will be
queued up twice.

When recovery runs a second time it may end up killing an unrelated
context.

Prevent this by masking off interrupts when triggering recovery.

Signed-off-by: Antonino Maniscalco <antomani103@gmail.com>
Reviewed-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/670023/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Antonino Maniscalco
2025-08-21 15:06:34 +02:00
committed by Greg Kroah-Hartman
parent f0db721d8f
commit 20d15d7660
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/msm/adreno/a6xx_gpu.c
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@@ -1522,6 +1522,9 @@ static void a6xx_fault_detect_irq(struct msm_gpu *gpu)
/* Turn off the hangcheck timer to keep it from bothering us */
del_timer(&gpu->hangcheck_timer);
/* Turn off interrupts to avoid triggering recovery again */
gpu_write(gpu, REG_A6XX_RBBM_INT_0_MASK, 0);
kthread_queue_work(gpu->worker, &gpu->recover_work);
}