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drm/i915: i915_gem_object_finish_gtt must always release gtt mmap 

Even if the object is no longer in the GTT domain, there may still be
a user space mapping which needs to be released.

Without this fix, render-based text (mostly in firefox) would
occasionally get corrupted when the system was under load.

Signed-off-by: Keith Packard <keithp@keithp.com>
hifive-unleashed-5.1
Keith Packard 2011-06-24 21:02:59 -07:00
parent 2cd1176bd9
commit b97c3d9c16
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/i915/i915_gem.c
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@ -2155,15 +2155,15 @@ static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
{
u32 old_write_domain, old_read_domains;
if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
return;
/* Act a barrier for all accesses through the GTT */
mb();
/* Force a pagefault for domain tracking on next user access */
i915_gem_release_mmap(obj);
if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
return;
old_read_domains = obj->base.read_domains;
old_write_domain = obj->base.write_domain;