drm/amdgpu/jpeg4: add additional ring reset error checking

Start and stop can fail, so add checks.

Fixes: 74894ff ("drm/amdgpu: Add ring reset callback for JPEG4_0_0")
Reviewed-by: Sathishkumar S <sathishkumar.sundararaju@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Sathishkumar S <sathishkumar.sundararaju@amd.com>

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c

@@ -730,8 +730,12 @@ static int jpeg_v4_0_ring_reset(struct amdgpu_ring *ring,
 		return -EINVAL;
 
 	drm_sched_wqueue_stop(&ring->sched);
-	jpeg_v4_0_stop(ring->adev);
-	jpeg_v4_0_start(ring->adev);
+	r = jpeg_v4_0_stop(ring->adev);
+	if (r)
+		return r;
+	r = jpeg_v4_0_start(ring->adev);
+	if (r)
+		return r;
 	r = amdgpu_ring_test_helper(ring);
 	if (r)
 		return r;