drm: drm_gem, check kzalloc retval

Check kzalloc retval against NULL in drm_gem_object_alloc and bail out
appropriately.

While at it merge the fail paths and jump to them by gotos at the end
of the function.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 8104eca..ffe8f43 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -134,26 +134,29 @@ drm_gem_object_alloc(struct drm_device *dev, size_t size)
        BUG_ON((size & (PAGE_SIZE - 1)) != 0);
 
        obj = kzalloc(sizeof(*obj), GFP_KERNEL);
+       if (!obj)
+               goto free;
 
        obj->dev = dev;
        obj->filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
-       if (IS_ERR(obj->filp)) {
-               kfree(obj);
-               return NULL;
-       }
+       if (IS_ERR(obj->filp))
+               goto free;
 
        kref_init(&obj->refcount);
        kref_init(&obj->handlecount);
        obj->size = size;
        if (dev->driver->gem_init_object != NULL &&
            dev->driver->gem_init_object(obj) != 0) {
-               fput(obj->filp);
-               kfree(obj);
-               return NULL;
+               goto fput;
        }
        atomic_inc(&dev->object_count);
        atomic_add(obj->size, &dev->object_memory);
        return obj;
+fput:
+       fput(obj->filp);
+free:
+       kfree(obj);
+       return NULL;
 }
 EXPORT_SYMBOL(drm_gem_object_alloc);