On Thu, Jan 5, 2017 at 3:11 PM, Michał Kępień <kernel@xxxxxxxxxx> wrote:
> Potential errors returned by some call_fext_func() calls inside
> logolamp_set() are currently ignored. Rework logolamp_set() to properly
> handle them. This causes one more call_fext_func() call to be made in
> the LED_OFF case, though one could argue that this is logically the
> right thing to do (even though the extra call is not needed to shut the
> LED off).
>
> Signed-off-by: Michał Kępień <kernel@xxxxxxxxxx>
> ---
> This is a follow-up to a recent patch, "platform/x86: fujitsu-laptop:
> use brightness_set_blocking for LED-setting callbacks" and thus needs
> the latter to be applied first (currently it is already applied in
> testing).
>
> Instead of sticking "if (ret < 0) return ret;" in two branches I decided
> to restructure logolamp_set() for improved clarity and also to make it
> resemble logolamp_get() a bit more.
>
> drivers/platform/x86/fujitsu-laptop.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
> index b725a907a91f..12f7a8346dd0 100644
> --- a/drivers/platform/x86/fujitsu-laptop.c
> +++ b/drivers/platform/x86/fujitsu-laptop.c
> @@ -271,15 +271,19 @@ static int call_fext_func(int cmd, int arg0, int arg1, int arg2)
> static int logolamp_set(struct led_classdev *cdev,
> enum led_brightness brightness)
> {
> - if (brightness >= LED_FULL) {
> - call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_ON);
> - return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, FUNC_LED_ON);
> - } else if (brightness >= LED_HALF) {
> - call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_ON);
> - return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, FUNC_LED_OFF);
> - } else {
> - return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_OFF);
> + int ret, poweron = FUNC_LED_OFF, always = FUNC_LED_OFF;
> +
> + if (brightness >= LED_HALF) {
> + poweron = FUNC_LED_ON;
> + if (brightness >= LED_FULL)
> + always = FUNC_LED_ON;
> }
But if you set ON by default the above could be written like
if (brightness < LED_FULL)
always = FUNC_LED_OFF;
if (brightness < LED_HALF)
poweron = FUNC_LED_OFF;
> +
> + ret = call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
> + if (ret < 0)
> + return ret;
> +
> + return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
> }
>
> static int kblamps_set(struct led_classdev *cdev,
> --
> 2.11.0
>
--
With Best Regards,
Andy Shevchenko
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