From 9e4565b215841e6b2596b35a2c0c632a6122f86d Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 9 Apr 2012 13:59:46 +0100 Subject: [PATCH] drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g commit 27c1cbd06a7620b354cbb363834f3bb8df4f410d upstream. The 845g shares the errata with i830 whereby executing a command within 2 cachelines of the end of the ringbuffer may cause a GPU hang. Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 536191540b03..cbc3c049611e 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1057,7 +1057,7 @@ int intel_init_ring_buffer(struct drm_device *dev, * of the buffer. */ ring->effective_size = ring->size; - if (IS_I830(ring->dev)) + if (IS_I830(ring->dev) || IS_845G(ring->dev)) ring->effective_size -= 128; return 0; -- 2.39.5