linux-kernel - Re: [PATCH] [v2] staging: iio: ad5933: avoid uninitialized variable in error case

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Date:   Tue, 25 Oct 2016 19:00:58 +0200
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Jonathan Cameron <jic23@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Michael Hennerich <Michael.Hennerich@...log.com>,
        Hartmut Knaack <knaack.h@....de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Alison Schofield <amsfield22@...il.com>,
        linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] staging: iio: ad5933: avoid uninitialized variable
 in error case

On 10/25/2016 06:57 PM, Jonathan Cameron wrote:
> On 24/10/16 16:22, Arnd Bergmann wrote:
>> The ad5933_i2c_read function returns an error code to indicate
>> whether it could read data or not. However ad5933_work() ignores
>> this return code and just accesses the data unconditionally,
>> which gets detected by gcc as a possible bug:
>>
>> drivers/staging/iio/impedance-analyzer/ad5933.c: In function 'ad5933_work':
>> drivers/staging/iio/impedance-analyzer/ad5933.c:649:16: warning: 'status' may be used uninitialized in this function [-Wmaybe-uninitialized]
>>
>> This adds minimal error handling so we only evaluate the
>> data if it was correctly read.
>>
>> Link: https://patchwork.kernel.org/patch/8110281/
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Looks good to me.
> 
> Lars?
> 

Looks good, thanks.

Acked-by: Lars-Peter Clausen <lars@...afoo.de>