From 09db1a462a03a1177a768406451405e4e0dcaf9a Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 1 Nov 2017 17:05:40 -0400 Subject: media: led-class-flash: better handle NULL flash struct The logic at V4L2 led core assumes that the flash struct can be null. However, it doesn't check for null while trying to set, causing some smatch to warn: drivers/media/v4l2-core/v4l2-flash-led-class.c:210 v4l2_flash_s_ctrl() error: we previously assumed 'fled_cdev' could be null (see line 200) Signed-off-by: Mauro Carvalho Chehab Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- include/linux/led-class-flash.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/led-class-flash.h') diff --git a/include/linux/led-class-flash.h b/include/linux/led-class-flash.h index e97966d1fb8d..700efaa9e115 100644 --- a/include/linux/led-class-flash.h +++ b/include/linux/led-class-flash.h @@ -121,6 +121,8 @@ extern void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev); static inline int led_set_flash_strobe(struct led_classdev_flash *fled_cdev, bool state) { + if (!fled_cdev) + return -EINVAL; return fled_cdev->ops->strobe_set(fled_cdev, state); } @@ -136,6 +138,8 @@ static inline int led_set_flash_strobe(struct led_classdev_flash *fled_cdev, static inline int led_get_flash_strobe(struct led_classdev_flash *fled_cdev, bool *state) { + if (!fled_cdev) + return -EINVAL; if (fled_cdev->ops->strobe_get) return fled_cdev->ops->strobe_get(fled_cdev, state); -- cgit v1.2.3-59-g8ed1b