linux-kernel - Re: [PATCH v2 1/2] platform/x86: fujitsu-laptop: rework logolamp

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Date:   Wed, 18 Jan 2017 21:02:12 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Jonathan Woithe <jwoithe@...t42.net>
Cc:     "Micha?? K??pie??" <kernel@...pniu.pl>,
        Darren Hart <dvhart@...radead.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] platform/x86: fujitsu-laptop: rework
 logolamp_set() to properly handle errors

On Mon, Jan 9, 2017 at 3:35 PM, Jonathan Woithe <jwoithe@...t42.net> wrote:
> On Mon, Jan 09, 2017 at 02:14:16PM +0100, Micha?? K??pie?? 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: Micha?? K??pie?? <kernel@...pniu.pl>
>
> Acked-by: Jonathan Woithe <jwoithe@...t42.net>

Both patches pushed to testing, thanks!

>
>> ---
>> Changes from v1:
>>
>>   - Decrease indentation by rearranging logical conditions.
>>   - Split variable declarations into two lines.
>>
>>  drivers/platform/x86/fujitsu-laptop.c | 23 ++++++++++++++---------
>>  1 file changed, 14 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
>> index b725a907a91f..34b8481fb0ed 100644
>> --- a/drivers/platform/x86/fujitsu-laptop.c
>> +++ b/drivers/platform/x86/fujitsu-laptop.c
>> @@ -271,15 +271,20 @@ 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 poweron = FUNC_LED_ON, always = FUNC_LED_ON;
>> +     int ret;
>> +
>> +     if (brightness < LED_HALF)
>> +             poweron = FUNC_LED_OFF;
>> +
>> +     if (brightness < LED_FULL)
>> +             always = 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
>>
>> --
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>
> --



-- 
With Best Regards,
Andy Shevchenko