drm/i915: Don't double-unpin buffers if we take a signal in evict_everything().

We haven't seen this in practice, but it was visible when looking at a bug
report from when i915_gem_evict_everything() was broken and would always
return error.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index c4ccaf3b3c7f..6a288a758385 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2498,6 +2498,7 @@ i915_gem_execbuffer(struct drm_device *dev, void *data,
                 /* unpin all of our buffers */
                 for (i = 0; i < pinned; i++)
                         i915_gem_object_unpin(object_list[i]);
+                pinned = 0;
 
                 /* evict everyone we can from the aperture */
                 ret = i915_gem_evict_everything(dev);