linux-kernel - Re: [PATCH] ptp: ptp_clockmatrix: initialize variables

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Date:   Mon, 12 Oct 2020 21:07:30 -0700
From:   Tom Rix <trix@...hat.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     natechancellor@...il.com, ndesaulniers@...gle.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] ptp: ptp_clockmatrix: initialize variables


On 10/12/20 3:01 PM, Richard Cochran wrote:
> On Sun, Oct 11, 2020 at 01:09:55PM -0700, trix@...hat.com wrote:
>> From: Tom Rix <trix@...hat.com>
>>
>> Clang static analysis reports this representative problem
>>
>> ptp_clockmatrix.c:1852:2: warning: 5th function call argument
>>   is an uninitialized value
>>         snprintf(idtcm->version, sizeof(idtcm->version), "%u.%u.%u",
>>         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> idtcm_display_version_info() calls several idtcm_read_*'s without
>> checking a return status.
> So why not check the return status?

calling function is a print information only function that returns void.

I do think not adding error handling is worth it.

I could change the return and then the calls if if you like.

Tom

>
> Your patch papers over the issue.
>
> Thanks,
> Richard
>