drm/aperture: Fix missing unlock on error in devm_aperture_acquire()

Add the missing unlock before return from function devm_aperture_acquire()
in the error handling case.

Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 730e7992dc1b ("drm/aperture: Add infrastructure for aperture ownership")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/1620895564-52367-1-git-send-email-zou_wei@huawei.com

diff --git a/drivers/gpu/drm/drm_aperture.c b/drivers/gpu/drm/drm_aperture.c
index 33bf018..9335d9d 100644 (file)
--- a/drivers/gpu/drm/drm_aperture.c
+++ b/drivers/gpu/drm/drm_aperture.c
@@ -164,13 +164,17 @@ static int devm_aperture_acquire(struct drm_device *dev,
 
        list_for_each(pos, &drm_apertures) {
                ap = container_of(pos, struct drm_aperture, lh);
-               if (overlap(base, end, ap->base, ap->base + ap->size))
+               if (overlap(base, end, ap->base, ap->base + ap->size)) {
+                       mutex_unlock(&drm_apertures_lock);
                        return -EBUSY;
+               }
        }
 
        ap = devm_kzalloc(dev->dev, sizeof(*ap), GFP_KERNEL);
-       if (!ap)
+       if (!ap) {
+               mutex_unlock(&drm_apertures_lock);
                return -ENOMEM;
+       }
 
        ap->dev = dev;
        ap->base = base;