[PATCH v2 03/26] media: led-class-flash: better handle NULL flash struct

[Mauro Carvalho Chehab]

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 <mche...@s-opensource.com>
---
 include/linux/led-class-flash.h | 4 ++++
 1 file changed, 4 insertions(+)

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);
 
-- 
2.13.6