drm/msm: unlock on error in msm_gem_get_iova()

We recently added locking to this function but there was a direct return
that was overlooked where we need to unlock.

Fixes: 0e08270a1f01 ("drm/msm: Separate locking of buffer resources from struct_mutex")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 65f3554..065d933 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -383,8 +383,10 @@ int msm_gem_get_iova(struct drm_gem_object *obj,
                struct page **pages;
 
                vma = add_vma(obj, aspace);
-               if (IS_ERR(vma))
-                       return PTR_ERR(vma);
+               if (IS_ERR(vma)) {
+                       ret = PTR_ERR(vma);
+                       goto unlock;
+               }
 
                pages = get_pages(obj);
                if (IS_ERR(pages)) {
@@ -405,7 +407,7 @@ int msm_gem_get_iova(struct drm_gem_object *obj,
 
 fail:
        del_vma(vma);
-
+unlock:
        mutex_unlock(&msm_obj->lock);
        return ret;
 }