Re: [PATCH] gpio: gpiolib: use devm_* API to simplify driver code

From	Alexandre Courbot <gnurou@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] gpio: gpiolib: use devm_* API to simplify driver code
Date	2015-08-31 07:20 +0200
Message-ID	<q3pFD-6ti-1@gated-at.bofh.it> (permalink)
References	<q0YJA-7eS-15@gated-at.bofh.it> <q1hVV-1br-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Aug 25, 2015 at 5:38 PM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:
> On 08/24/2015 03:05 PM, Peng Fan wrote:
>>
>> Use devm_* API to simplify driver code.
>>
>> Signed-off-by: Peng Fan <van.freenix@gmail.com>
>> Cc: Linus Walleij <linus.walleij@linaro.org>
>> Cc: Alexandre Courbot <gnurou@gmail.com>
>
>  ---
>>
>>   drivers/gpio/gpiolib.c | 11 +++++------
>>   1 file changed, 5 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
>> index 6bc612b..f9470b0 100644
>> --- a/drivers/gpio/gpiolib.c
>> +++ b/drivers/gpio/gpiolib.c
>> @@ -243,7 +243,8 @@ int gpiochip_add(struct gpio_chip *chip)
>>         int             base = chip->base;
>>         struct gpio_desc *descs;
>>
>> -       descs = kcalloc(chip->ngpio, sizeof(descs[0]), GFP_KERNEL);
>> +       descs = devm_kcalloc(chip->dev, chip->ngpio, sizeof(descs[0]),
>> +                            GFP_KERNEL);
>
>
> ^ above will not work for every one as NOT all GPIO drivers
> implemented using dev/drv model, so chip->dev could be not set
> (at least it was true when I've checked it last time).

AFAICT that is still true as of today.
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Thread

[PATCH] gpio: gpiolib: use devm_* API to simplify driver code Peng Fan <van.freenix@gmail.com> - 2015-08-24 14:10 +0200
  Re: [PATCH] gpio: gpiolib: use devm_* API to simplify driver code Grygorii Strashko <grygorii.strashko@ti.com> - 2015-08-25 10:40 +0200
    Re: [PATCH] gpio: gpiolib: use devm_* API to simplify driver code Alexandre Courbot <gnurou@gmail.com> - 2015-08-31 07:20 +0200
    Re: [PATCH] gpio: gpiolib: use devm_* API to simplify driver code Peng Fan <van.freenix@gmail.com> - 2015-09-05 15:40 +0200

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