[PATCH 4.7 082/143] drm/amd/amdgpu: compute ring test fail during S4 on CI

[Greg Kroah-Hartman]

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: jimqu <Jim.Qu@xxxxxxx>

commit 53960b4f89db58bc155d6f8aa0a44ccc59ccb26f upstream.

unhalt Instrction Fetch Unit after all rings are inited.

Signed-off-by: JimQu <Jim.Qu@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
@@ -2777,8 +2777,7 @@ static int gfx_v7_0_cp_compute_resume(st
 	u64 wb_gpu_addr;
 	u32 *buf;
 	struct bonaire_mqd *mqd;
-
-	gfx_v7_0_cp_compute_enable(adev, true);
+	struct amdgpu_ring *ring;
 
 	/* fix up chicken bits */
 	tmp = RREG32(mmCP_CPF_DEBUG);
@@ -2813,7 +2812,7 @@ static int gfx_v7_0_cp_compute_resume(st
 
 	/* init the queues.  Just two for now. */
 	for (i = 0; i < adev->gfx.num_compute_rings; i++) {
-		struct amdgpu_ring *ring = &adev->gfx.compute_ring[i];
+		ring = &adev->gfx.compute_ring[i];
 
 		if (ring->mqd_obj == NULL) {
 			r = amdgpu_bo_create(adev,
@@ -2992,6 +2991,13 @@ static int gfx_v7_0_cp_compute_resume(st
 		amdgpu_bo_unreserve(ring->mqd_obj);
 
 		ring->ready = true;
+	}
+
+	gfx_v7_0_cp_compute_enable(adev, true);
+
+	for (i = 0; i < adev->gfx.num_compute_rings; i++) {
+		ring = &adev->gfx.compute_ring[i];
+
 		r = amdgpu_ring_test_ring(ring);
 		if (r)
 			ring->ready = false;