5.15-stable review patch. If anyone has any objections, please let me know.
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From: Antonino Maniscalco antomani103@gmail.com
[ Upstream commit 10fb1b2fcaee5545a5e54db1ed4d7b15c2db50c8 ]
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 --- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 1c38c3acacbeb..95c31009bbec1 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -1386,6 +1386,9 @@ 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); }