Thread (37 messages) 37 messages, 10 authors, 2025-02-04

Re: [PATCH 00/13] gpiolib: add gpiods_set_array_value_cansleep

From: Linus Walleij <hidden>
Date: 2025-01-31 22:46:06
Also in: linux-gpio, linux-iio, linux-mmc, linux-phy, linux-sound, lkml

Hi David,

On Fri, Jan 31, 2025 at 9:24 PM David Lechner [off-list ref] wrote:
This series was inspired by some minor annoyance I have experienced a
few times in recent reviews.

Calling gpiod_set_array_value_cansleep() can be quite verbose due to
having so many parameters. In most cases, we already have a struct
gpio_descs that contains the first 3 parameters so we end up with 3 (or
often even 6) pointer indirections at each call site. Also, people have
a tendency to want to hard-code the first argument instead of using
struct gpio_descs.ndescs, often without checking that ndescs >= the
hard-coded value.

So I'm proposing that we add a gpiods_set_array_value_cansleep()
function that is a wrapper around gpiod_set_array_value_cansleep()
that has struct gpio_descs as the first parameter to make it a bit
easier to read the code and avoid the hard-coding temptation.

I've just done gpiods_set_array_value_cansleep() for now since there
were over 10 callers of this one. There aren't as many callers of
the get and atomic variants, but we can add those too if this seems
like a useful thing to do.
I like it.
Reviewed-by: Linus Walleij <redacted>

for the series.

Yours,
Linus Walleij
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