drm/i915/ringbuffer: Check that we setup the ringbuffer (176f28eb) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/gpu/drm/i915/intel_ringbuffer.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -176,9 +176,10 @@ static int init_ring_common(struct intel_ring_buffer *ring)
		((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
		\| RING_NO_REPORT \| RING_VALID);

		head = I915_READ_HEAD(ring) & HEAD_ADDR;
		/* If the head is still not zero, the ring is dead */
		if (head != 0) {
		if ((I915_READ_CTL(ring) & RING_VALID) == 0 \|\|
		I915_READ_START(ring) != obj_priv->gtt_offset \|\|
		(I915_READ_HEAD(ring) & HEAD_ADDR) != 0) {
		DRM_ERROR("%s initialization failed "
		"ctl %08x head %08x tail %08x start %08x\n",
		ring->name,