drm: Distinguish no name from ENOMEM in set_unique()

If passing name == NULL to drm_drv_set_unique() we now get -ENOMEM as kstrdup() returns NULL. Instead check for this explicitly and return -EINVAL if no name is provided. Signed-off-by: Tom Gundersen <[email protected]> Signed-off-by: Sean Paul <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
jimmycarry · Sep 22, 2016 · c6bf811 · c6bf811
1 parent f566911
commit c6bf811
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
@@ -338,6 +338,9 @@ void drm_minor_release(struct drm_minor *minor)
 
 static int drm_dev_set_unique(struct drm_device *dev, const char *name)
 {
+	if (!name)
+		return -EINVAL;
+
 	kfree(dev->unique);
 	dev->unique = kstrdup(name, GFP_KERNEL);