i915: fix i915_ring_validate()

diff --git a/shared-core/i915_dma.c b/shared-core/i915_dma.c
index 5a69b1f..c874ce2 100644 (file)
--- a/shared-core/i915_dma.c
+++ b/shared-core/i915_dma.c
@@ -119,8 +119,8 @@ void i915_ring_validate(struct drm_device *dev, const char *func, int line)
 {
        drm_i915_private_t *dev_priv = dev->dev_private;
        drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
-       u32     tail = I915_READ(LP_RING+RING_TAIL) & HEAD_ADDR;
-       u32     head = I915_READ(LP_RING+RING_HEAD) & HEAD_ADDR;
+       u32     tail = I915_READ(PRB0_TAIL) & HEAD_ADDR;
+       u32     head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 
        if (tail != ring->tail) {
                DRM_ERROR("%s:%d head sw %x, hw %x. tail sw %x hw %x\n",