drm/syncobj: add a new helper drm_syncobj_get_fd

Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/drm_syncobj.c

@@ -386,33 +386,38 @@ static int drm_syncobj_alloc_file(struct drm_syncobj *syncobj)
 	return 0;
 }
 
-static int drm_syncobj_handle_to_fd(struct drm_file *file_private,
-				    u32 handle, int *p_fd)
+int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd)
 {
-	struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
 	int ret;
 	int fd;
 
-	if (!syncobj)
-		return -EINVAL;
-
 	fd = get_unused_fd_flags(O_CLOEXEC);
-	if (fd < 0) {
-		drm_syncobj_put(syncobj);
+	if (fd < 0)
 		return fd;
-	}
 
 	if (!syncobj->file) {
 		ret = drm_syncobj_alloc_file(syncobj);
-		if (ret)
-			goto out_put_fd;
+		if (ret) {
+			put_unused_fd(fd);
+			return ret;
+		}
 	}
 	fd_install(fd, syncobj->file);
-	drm_syncobj_put(syncobj);
 	*p_fd = fd;
 	return 0;
-out_put_fd:
-	put_unused_fd(fd);
+}
+EXPORT_SYMBOL(drm_syncobj_get_fd);
+
+static int drm_syncobj_handle_to_fd(struct drm_file *file_private,
+				    u32 handle, int *p_fd)
+{
+	struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
+	int ret;
+
+	if (!syncobj)
+		return -EINVAL;
+
+	ret = drm_syncobj_get_fd(syncobj, p_fd);
 	drm_syncobj_put(syncobj);
 	return ret;
 }

include/drm/drm_syncobj.h

@@ -140,5 +140,6 @@ int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
 		       struct dma_fence *fence);
 int drm_syncobj_get_handle(struct drm_file *file_private,
 			   struct drm_syncobj *syncobj, u32 *handle);
+int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd);
 
 #endif