drm/i915: Fix object refcount leak on mmappable size limit error path.

commit 14660ccd599dc7bd6ecef17408bd76dc853f9b77 upstream.

I've been seeing memory leaks on my system in the form of large
(300-400MB) GEM objects created by now-dead processes laying around
clogging up memory.  I usually notice when it gets to about 1.2GB of
them.  Hopefully this clears up the issue, but I just found this bug
by inspection.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a546a71fb060abddd9d160abf3df61a90aa4eb33..346d5574f0af8589fdbef5d34ae2f1bb897162cd 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1475,7 +1475,7 @@ i915_gem_mmap_gtt(struct drm_file *file,
 
        if (obj->base.size > dev_priv->mm.gtt_mappable_end) {
                ret = -E2BIG;
-               goto unlock;
+               goto out;
        }
 
        if (obj->madv != I915_MADV_WILLNEED) {