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Date: Thu, 19 Apr 2012 14:06:12 -0700 From: Greg KH <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Chris Wilson <chris@...is-wilson.co.uk>, Daniel Vetter <daniel.vetter@...ll.ch> Subject: [ 01/59] drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris Wilson <chris@...is-wilson.co.uk> 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 <chris@...is-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -863,7 +863,7 @@ int intel_init_ring_buffer(struct drm_de * 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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