Commit 0fcfb300 authored by xinhui pan's avatar xinhui pan Committed by Alex Deucher
Browse files

drm/amdgpu: Fix a race of IB test 



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

Signed-off-by: default avatarxinhui pan <xinhui.pan@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 405a81ae

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

+2 −2
Original line number Diff line number Diff line
@@ -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);