linux-kernel - Re: [PATCH] pwm: Fix uninitialized warnings in pwm

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Message-ID: <20140829082430.GC13371@ulmo>
Date:	Fri, 29 Aug 2014 10:24:31 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Geert Uytterhoeven <geert+renesas@...der.be>
Cc:	linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pwm: Fix uninitialized warnings in pwm_get()

On Thu, Aug 28, 2014 at 11:03:14AM +0200, Geert Uytterhoeven wrote:
> With some versions of gcc (e.g. 4.1.2):
> 
> drivers/pwm/core.c: In function ‘pwm_get’:
> drivers/pwm/core.c:610: warning: ‘polarity’ may be used uninitialized in this function
> drivers/pwm/core.c:609: warning: ‘period’ may be used uninitialized in this function
> 
> While these are false positives, we can get rid of them by refactoring
> the code to store a pointer to the best match, as suggested before by
> Thierry Reding. This does require moving the mutex_unlock() down.
> 
> Fixes: d717ea73e36dd565 ("pwm: Fix period and polarity in pwm_get() for non-perfect matches")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
>  drivers/pwm/core.c | 29 ++++++++++++++---------------
>  1 file changed, 14 insertions(+), 15 deletions(-)

Applied, thanks.

Thierry

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