[patch] drm/etnaviv: unlock on error in etnaviv_gem_get_iova()

[Dan Carpenter]

We have to drop a lock before returning -ENOMEM here.

Fixes: a8c21a5451d8 ('drm/etnaviv: add initial etnaviv DRM driver')
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c 
b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
index 8d6f859..9f77c3b 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
@@ -305,8 +305,10 @@ int etnaviv_gem_get_iova(struct etnaviv_gpu *gpu,
        mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj, NULL);
        if (!mapping) {
                mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
-               if (!mapping)
-                       return -ENOMEM;
+               if (!mapping) {
+                       ret = -ENOMEM;
+                       goto out;
+               }

                INIT_LIST_HEAD(&mapping->scan_node);
                mapping->object = etnaviv_obj;