From: Jesse Barnes Date: Fri, 23 Apr 2010 16:32:23 +0000 (-0700) Subject: drm/i915: fix non-Ironlake 965 class crashes X-Git-Tag: firefly_0821_release~9833^2~2305 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1918ad77f7f908ed67cf37c505c6ad4ac52f1ecf;p=firefly-linux-kernel-4.4.55.git drm/i915: fix non-Ironlake 965 class crashes My PIPE_CONTROL fix (just sent via Eric's tree) was buggy; I was testing a whole set of patches together and missed a conversion to the new HAS_PIPE_CONTROL macro, which will cause breakage on non-Ironlake 965 class chips. Fortunately, the fix is trivial and has been tested. Be sure to use the HAS_PIPE_CONTROL macro in i915_get_gem_seqno, or we'll end up reading the wrong graphics memory, likely causing hangs, crashes, or worse. Reported-by: Zdenek Kabelac Reported-by: Toralf Förster Tested-by: Toralf Förster Signed-off-by: Jesse Barnes Signed-off-by: Linus Torvalds --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7f52cc124cfe..ef3d91dda71a 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1793,7 +1793,7 @@ i915_get_gem_seqno(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; - if (IS_I965G(dev)) + if (HAS_PIPE_CONTROL(dev)) return ((volatile u32 *)(dev_priv->seqno_page))[0]; else return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX);