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drm/amdgpu: Fix a race of IB test

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Direct IB submission should be exclusive. So use write lock.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
xinhui pan 2021-09-11 09:41:29 +08:00 committed by Alex Deucher
parent 405a81ae3f
commit 0fcfb30019
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
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@ -1358,7 +1358,7 @@ static int amdgpu_debugfs_test_ib_show(struct seq_file *m, void *unused)
}
/* Avoid accidently unparking the sched thread during GPU reset */
r = down_read_killable(&adev->reset_sem);
r = down_write_killable(&adev->reset_sem);
if (r)
return r;
@ -1387,7 +1387,7 @@ static int amdgpu_debugfs_test_ib_show(struct seq_file *m, void *unused)
kthread_unpark(ring->sched.thread);
}
up_read(&adev->reset_sem);
up_write(&adev->reset_sem);
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);