Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
---
drivers/gpu/drm/ast/ast_main.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 035dacc93382..838217f8ce7d 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -571,24 +571,18 @@ ast_dumb_mmap_offset(struct drm_file *file,
uint64_t *offset)
{
struct drm_gem_object *obj;
- int ret;
struct ast_bo *bo;
- mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file, handle);
- if (obj == NULL) {
- ret = -ENOENT;
- goto out_unlock;
- }
+ if (obj == NULL)
+ return -ENOENT;
bo = gem_to_ast_bo(obj);
*offset = ast_bo_mmap_offset(bo);
- drm_gem_object_unreference(obj);
- ret = 0;
-out_unlock:
- mutex_unlock(&dev->struct_mutex);
- return ret;
+ drm_gem_object_unreference_unlocked(obj);
+
+ return 0;
}
--
2.1.4
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