From: Chris Wilson Date: Thu, 28 Oct 2010 10:18:07 +0000 (+0100) Subject: drm/i915/ringbuffer: Check that we setup the ringbuffer X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=176f28ebf4303b4f7e3a5bd8be7842a8bbecd9c3;p=linux-beck.git drm/i915/ringbuffer: Check that we setup the ringbuffer Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 8eaa60cc5d25..e88214ef24b1 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -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,