drm: ioremap balanced with iounmap for drivers/char/drm

ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Tested (compilation only) to make sure the files are compiling without
any warning/error due to new changes

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index 029baea33b62..6eafff13dab6 100644
--- a/drivers/char/drm/drm_bufs.c
+++ b/drivers/char/drm/drm_bufs.c
@@ -237,6 +237,8 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
 
         list = drm_alloc(sizeof(*list), DRM_MEM_MAPS);
         if (!list) {
+                if (map->type == _DRM_REGISTERS)
+                        drm_ioremapfree(map->handle, map->size, dev);
                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
                 return -EINVAL;
         }
@@ -252,6 +254,8 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
                 map->offset;
         ret = drm_map_handle(dev, &list->hash, user_token, 0);
         if (ret) {
+                if (map->type == _DRM_REGISTERS)
+                        drm_ioremapfree(map->handle, map->size, dev);
                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
                 drm_free(list, sizeof(*list), DRM_MEM_MAPS);
                 mutex_unlock(&dev->struct_mutex);