backlight_update_status() may be called from code that does not have
any valid backlight device. To avoid ifdeffery and too much conditionals
silently fail if the backlight_device is NULL.
Signed-off-by: Sam Ravnborg <s...@ravnborg.org>
Cc: Lee Jones <lee.jo...@linaro.org>
Cc: Daniel Thompson <daniel.thomp...@linaro.org>
Cc: Jingoo Han <jingooh...@gmail.com>
---
include/linux/backlight.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index 614653e07e3a..190963ffb7fc 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -348,6 +348,9 @@ static inline int backlight_update_status(struct
backlight_device *bd)
{
int ret = -ENOENT;
+ if (!bd)
+ return 0;
+
mutex_lock(&bd->update_lock);
if (bd->ops && bd->ops->update_status)
ret = bd->ops->update_status(bd);
--
2.25.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
