Messages in this thread | | | From | Bryan Wu <> | Date | Thu, 14 May 2015 13:50:16 -0700 | Subject | Re: [PATCH] leds: remove redundant SET_BRIGHTNESS_SYNC flag |
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On Thu, May 14, 2015 at 2:11 AM, Jacek Anaszewski <j.anaszewski@samsung.com> wrote: > I personally can't find any strong argument against this optimization. > I added both flags on Bryan's request while implementing LED Flash class > extension. I can see a few occurrences in the include/linux directory > where both SYNC and ASYNC flags are implemented. The argument in favour > could be the fact that the flags influence the core functionality of > the subsystem. > > Bryan, could you express your opinion, please? >
Please keep this flag and although it's redundant at this point I think it's still make code more clear and easy to understand.
Thanks, -Bryan
> > On 05/13/2015 05:41 PM, Stas Sergeev wrote: >> >> >> There is a complimentary flag called SET_BRIGHTNESS_ASYNC. >> Having both is redundant. This patch removes the unneeded flag >> without any functionality change. >> >> CC: Bryan Wu <cooloney@gmail.com> >> CC: Richard Purdie <rpurdie@rpsys.net> >> CC: linux-leds@vger.kernel.org >> CC: linux-kernel@vger.kernel.org >> >> Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net> >> --- >> drivers/leds/led-class-flash.c | 1 - >> drivers/leds/led-core.c | 4 +--- >> include/linux/leds.h | 2 +- >> 3 files changed, 2 insertions(+), 5 deletions(-) >> >> diff --git a/drivers/leds/led-class-flash.c >> b/drivers/leds/led-class-flash.c >> index 3b25734..bb67364 100644 >> --- a/drivers/leds/led-class-flash.c >> +++ b/drivers/leds/led-class-flash.c >> @@ -318,7 +318,6 @@ int led_classdev_flash_register(struct device *parent, >> >> /* Setting a torch brightness needs to have immediate effect */ >> led_cdev->flags &= ~SET_BRIGHTNESS_ASYNC; >> - led_cdev->flags |= SET_BRIGHTNESS_SYNC; >> >> return 0; >> } >> diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c >> index 9886dac..356e851 100644 >> --- a/drivers/leds/led-core.c >> +++ b/drivers/leds/led-core.c >> @@ -129,10 +129,8 @@ void led_set_brightness(struct led_classdev >> *led_cdev, >> if (led_cdev->flags & SET_BRIGHTNESS_ASYNC) { >> led_set_brightness_async(led_cdev, brightness); >> return; >> - } else if (led_cdev->flags & SET_BRIGHTNESS_SYNC) >> + } else >> ret = led_set_brightness_sync(led_cdev, brightness); >> - else >> - ret = -EINVAL; >> >> if (ret < 0) >> dev_dbg(led_cdev->dev, "Setting LED brightness failed >> (%d)\n", >> diff --git a/include/linux/leds.h b/include/linux/leds.h >> index 9a2b000..c9e6e5d 100644 >> --- a/include/linux/leds.h >> +++ b/include/linux/leds.h >> @@ -45,7 +45,7 @@ struct led_classdev { >> #define LED_BLINK_INVERT (1 << 19) >> #define LED_SYSFS_DISABLE (1 << 20) >> #define SET_BRIGHTNESS_ASYNC (1 << 21) >> -#define SET_BRIGHTNESS_SYNC (1 << 22) >> +/* bit 22 unused, take it */ >> #define LED_DEV_CAP_FLASH (1 << 23) >> >> /* Set LED brightness level */ >> > > > -- > Best Regards, > Jacek Anaszewski
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