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drm/i915; Only increment the user-pin-count after successfully pinning the bo

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As along the error path we do not correct the user pin-count for the
failure, we may end up with userspace believing that it has a pinned
object at offset 0 (when interrupted by a signal for example).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2013-01-02 10:31:22 +00:00 committed by Daniel Vetter
parent d1c3ed669a
commit 93be8788e6
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/i915/i915_gem.c
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@ -3522,14 +3522,15 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data,
goto out;
}
obj->user_pin_count++;
obj->pin_filp = file;
if (obj->user_pin_count == 1) {
if (obj->user_pin_count == 0) {
ret = i915_gem_object_pin(obj, args->alignment, true, false);
if (ret)
goto out;
}
obj->user_pin_count++;
obj->pin_filp = file;
/* XXX - flush the CPU caches for pinned objects
* as the X server doesn't manage domains yet
*/