drm/amdgpu: remove usec timeout loop from IB tests

We already waited for the fence, so waiting for the registers
is completely pointless and just copy & pasted from the ring test.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -622,7 +622,6 @@ static int cik_sdma_ring_test_ib(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct amdgpu_ib ib;
 	struct fence *f = NULL;
-	unsigned i;
 	unsigned index;
 	int r;
 	u32 tmp = 0;
@@ -644,7 +643,8 @@ static int cik_sdma_ring_test_ib(struct amdgpu_ring *ring)
 		goto err0;
 	}
 
-	ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
+	ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE,
+				SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 	ib.ptr[1] = lower_32_bits(gpu_addr);
 	ib.ptr[2] = upper_32_bits(gpu_addr);
 	ib.ptr[3] = 1;
@@ -659,16 +659,9 @@ static int cik_sdma_ring_test_ib(struct amdgpu_ring *ring)
 		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
 		goto err1;
 	}
-	for (i = 0; i < adev->usec_timeout; i++) {
-		tmp = le32_to_cpu(adev->wb.wb[index]);
-		if (tmp == 0xDEADBEEF)
-			break;
-		DRM_UDELAY(1);
-	}
-	if (i < adev->usec_timeout) {
-		DRM_INFO("ib test on ring %d succeeded in %u usecs\n",
-			 ring->idx, i);
-		goto err1;
+	tmp = le32_to_cpu(adev->wb.wb[index]);
+	if (tmp == 0xDEADBEEF) {
+		DRM_INFO("ib test on ring %d succeeded\n", ring->idx);
 	} else {
 		DRM_ERROR("amdgpu: ib test failed (0x%08X)\n", tmp);
 		r = -EINVAL;

drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c

@@ -2112,7 +2112,6 @@ static int gfx_v7_0_ring_test_ib(struct amdgpu_ring *ring)
 	struct fence *f = NULL;
 	uint32_t scratch;
 	uint32_t tmp = 0;
-	unsigned i;
 	int r;
 
 	r = amdgpu_gfx_scratch_get(adev, &scratch);
@@ -2141,16 +2140,9 @@ static int gfx_v7_0_ring_test_ib(struct amdgpu_ring *ring)
 		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
 		goto err2;
 	}
-	for (i = 0; i < adev->usec_timeout; i++) {
-		tmp = RREG32(scratch);
-		if (tmp == 0xDEADBEEF)
-			break;
-		DRM_UDELAY(1);
-	}
-	if (i < adev->usec_timeout) {
-		DRM_INFO("ib test on ring %d succeeded in %u usecs\n",
-			 ring->idx, i);
-		goto err2;
+	tmp = RREG32(scratch);
+	if (tmp == 0xDEADBEEF) {
+		DRM_INFO("ib test on ring %d succeeded\n", ring->idx);
 	} else {
 		DRM_ERROR("amdgpu: ib test failed (scratch(0x%04X)=0x%08X)\n",
 			  scratch, tmp);

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -784,7 +784,6 @@ static int gfx_v8_0_ring_test_ib(struct amdgpu_ring *ring)
 	struct fence *f = NULL;
 	uint32_t scratch;
 	uint32_t tmp = 0;
-	unsigned i;
 	int r;
 
 	r = amdgpu_gfx_scratch_get(adev, &scratch);
@@ -813,16 +812,9 @@ static int gfx_v8_0_ring_test_ib(struct amdgpu_ring *ring)
 		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
 		goto err2;
 	}
-	for (i = 0; i < adev->usec_timeout; i++) {
-		tmp = RREG32(scratch);
-		if (tmp == 0xDEADBEEF)
-			break;
-		DRM_UDELAY(1);
-	}
-	if (i < adev->usec_timeout) {
-		DRM_INFO("ib test on ring %d succeeded in %u usecs\n",
-			 ring->idx, i);
-		goto err2;
+	tmp = RREG32(scratch);
+	if (tmp == 0xDEADBEEF) {
+		DRM_INFO("ib test on ring %d succeeded\n", ring->idx);
 	} else {
 		DRM_ERROR("amdgpu: ib test failed (scratch(0x%04X)=0x%08X)\n",
 			  scratch, tmp);

drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c

@@ -671,7 +671,6 @@ static int sdma_v2_4_ring_test_ib(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct amdgpu_ib ib;
 	struct fence *f = NULL;
-	unsigned i;
 	unsigned index;
 	int r;
 	u32 tmp = 0;
@@ -713,16 +712,9 @@ static int sdma_v2_4_ring_test_ib(struct amdgpu_ring *ring)
 		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
 		goto err1;
 	}
-	for (i = 0; i < adev->usec_timeout; i++) {
-		tmp = le32_to_cpu(adev->wb.wb[index]);
-		if (tmp == 0xDEADBEEF)
-			break;
-		DRM_UDELAY(1);
-	}
-	if (i < adev->usec_timeout) {
-		DRM_INFO("ib test on ring %d succeeded in %u usecs\n",
-			 ring->idx, i);
-		goto err1;
+	tmp = le32_to_cpu(adev->wb.wb[index]);
+	if (tmp == 0xDEADBEEF) {
+		DRM_INFO("ib test on ring %d succeeded\n", ring->idx);
 	} else {
 		DRM_ERROR("amdgpu: ib test failed (0x%08X)\n", tmp);
 		r = -EINVAL;

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

@@ -901,7 +901,6 @@ static int sdma_v3_0_ring_test_ib(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct amdgpu_ib ib;
 	struct fence *f = NULL;
-	unsigned i;
 	unsigned index;
 	int r;
 	u32 tmp = 0;
@@ -943,16 +942,9 @@ static int sdma_v3_0_ring_test_ib(struct amdgpu_ring *ring)
 		DRM_ERROR("amdgpu: fence wait failed (%d).\n", r);
 		goto err1;
 	}
-	for (i = 0; i < adev->usec_timeout; i++) {
-		tmp = le32_to_cpu(adev->wb.wb[index]);
-		if (tmp == 0xDEADBEEF)
-			break;
-		DRM_UDELAY(1);
-	}
-	if (i < adev->usec_timeout) {
-		DRM_INFO("ib test on ring %d succeeded in %u usecs\n",
-			 ring->idx, i);
-		goto err1;
+	tmp = le32_to_cpu(adev->wb.wb[index]);
+	if (tmp == 0xDEADBEEF) {
+		DRM_INFO("ib test on ring %d succeeded\n", ring->idx);
 	} else {
 		DRM_ERROR("amdgpu: ib test failed (0x%08X)\n", tmp);
 		r = -EINVAL;