linux-kernel - Re: [PATCH] iio: tsl2772: remove unused prox_diode

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Date:   Sat, 1 Apr 2023 15:20:28 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Tom Rix <trix@...hat.com>, lars@...afoo.de, nathan@...nel.org,
        ndesaulniers@...gle.com, u.kleine-koenig@...gutronix.de,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Chuhong Yuan <hslester96@...il.com>,
        Brian Masney <bmasney@...hat.com>,
        Brian Masney <masneyb@...tation.org>
Subject: Re: [PATCH] iio: tsl2772: remove unused prox_diode_mask variable

On Mon, 27 Mar 2023 16:07:48 +0300
Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:

> On Mon, Mar 27, 2023 at 08:08:23AM -0400, Tom Rix wrote:
> > clang with W=1 reports
> > drivers/iio/light/tsl2772.c:576:24: error: variable
> >   'prox_diode_mask' set but not used [-Werror,-Wunused-but-set-variable]
> >         int i, ret, num_leds, prox_diode_mask;
> >                               ^
> > This variable is not used so remove it.  
> 
> While from the compilation point of view this is a correct fix, I think
> we need to hear from the author (or interested stakeholders) about this
> feature. Perhaps it should be enabled / fixed differently.
> 

Superficially it looks like this value should have been stored to
chip->settings.prox_diode

+CC people who might know...

Jonathan