Re: [PATCH] backlight: change the return type of backlight_update_status() to int
On Thu, 28 May 2015, Hyungwon Hwang wrote: > Backlight device returns the result of update_status(), but > backlight_update_status() ignores it. So the consumers cannot confirm the > result of their function call. This patch makes the result to be returned > back for consumers. > > Signed-off-by: Hyungwon Hwang > --- > include/linux/backlight.h | 8 ++-- > 1 file changed, 6 insertions(+), 2 deletions(-) Applied with Jingoo's Ack, thanks. > diff --git a/include/linux/backlight.h b/include/linux/backlight.h > index adb14a8..1e7a69a 100644 > --- a/include/linux/backlight.h > +++ b/include/linux/backlight.h > @@ -117,12 +117,16 @@ struct backlight_device { > int use_count; > }; > > -static inline void backlight_update_status(struct backlight_device *bd) > +static inline int backlight_update_status(struct backlight_device *bd) > { > + int ret = -ENOENT; > + > mutex_lock(&bd->update_lock); > if (bd->ops && bd->ops->update_status) > - bd->ops->update_status(bd); > + ret = bd->ops->update_status(bd); > mutex_unlock(&bd->update_lock); > + > + return ret; > } > > extern struct backlight_device *backlight_device_register(const char *name, -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH] backlight: change the return type of backlight_update_status() to int
On Thursday, May 28, 2015 4:25 PM, Hyungwon Hwang wrote: > > Backlight device returns the result of update_status(), but > backlight_update_status() ignores it. So the consumers cannot confirm the > result of their function call. This patch makes the result to be returned > back for consumers. > > Signed-off-by: Hyungwon Hwang Acked-by: Jingoo Han > --- > include/linux/backlight.h | 8 ++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/include/linux/backlight.h b/include/linux/backlight.h > index adb14a8..1e7a69a 100644 > --- a/include/linux/backlight.h > +++ b/include/linux/backlight.h > @@ -117,12 +117,16 @@ struct backlight_device { > int use_count; > }; > > -static inline void backlight_update_status(struct backlight_device *bd) > +static inline int backlight_update_status(struct backlight_device *bd) > { > + int ret = -ENOENT; > + > mutex_lock(&bd->update_lock); > if (bd->ops && bd->ops->update_status) > - bd->ops->update_status(bd); > + ret = bd->ops->update_status(bd); > mutex_unlock(&bd->update_lock); > + > + return ret; > } > > extern struct backlight_device *backlight_device_register(const char *name, > -- > 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH] backlight: change the return type of backlight_update_status() to int
Backlight device returns the result of update_status(), but backlight_update_status() ignores it. So the consumers cannot confirm the result of their function call. This patch makes the result to be returned back for consumers. Signed-off-by: Hyungwon Hwang --- include/linux/backlight.h | 8 ++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/include/linux/backlight.h b/include/linux/backlight.h index adb14a8..1e7a69a 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -117,12 +117,16 @@ struct backlight_device { int use_count; }; -static inline void backlight_update_status(struct backlight_device *bd) +static inline int backlight_update_status(struct backlight_device *bd) { + int ret = -ENOENT; + mutex_lock(&bd->update_lock); if (bd->ops && bd->ops->update_status) - bd->ops->update_status(bd); + ret = bd->ops->update_status(bd); mutex_unlock(&bd->update_lock); + + return ret; } extern struct backlight_device *backlight_device_register(const char *name, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/