linux-kernel - Re: [PATCH v2 1/2] soc: qcom: geni: Don't ignore clk_round_rate() errors in geni_se_clk_tbl

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Date:   Thu, 6 Sep 2018 15:40:32 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...org,
        Andy Gross <andy.gross@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Girish Mahadevan <girishm@...eaurora.org>,
        Dilip Kota <dkota@...eaurora.org>,
        Evan Green <evgreen@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        David Brown <david.brown@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] soc: qcom: geni: Don't ignore clk_round_rate()
 errors in geni_se_clk_tbl_get()

On Thu, Sep 06, 2018 at 03:39:04PM -0700, Doug Anderson wrote:
> Hi
> 
> On Thu, Sep 6, 2018 at 3:35 PM, kbuild test robot <lkp@...el.com> wrote:
> > Hi Douglas,
> >
> > Thank you for the patch! Perhaps something to improve:
> >
> > [auto build test WARNING on agross/for-next]
> > [also build test WARNING on v4.19-rc2 next-20180906]
> > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> >
> > url:    https://github.com/0day-ci/linux/commits/Douglas-Anderson/soc-qcom-geni-Don-t-ignore-clk_round_rate-errors-in-geni_se_clk_tbl_get/20180907-045155
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/agross/linux.git for-next
> > config: i386-allmodconfig (attached as .config)
> > compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
> > reproduce:
> >         # save the attached .config to linux build tree
> >         make ARCH=i386
> >
> > Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
> > http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
> >
> > All warnings (new ones prefixed by >>):
> >
> >    drivers/soc/qcom/qcom-geni-se.c: In function 'geni_se_clk_tbl_get':
> >>> drivers/soc/qcom/qcom-geni-se.c:531:39: warning: 'freq' may be used uninitialized in this function [-Wmaybe-uninitialized]
> >       freq = clk_round_rate(se->clk, freq + 1);
> >                                      ~~~~~^~~
> 
> Oh crud.  Yeah.  ...so v1 was right after all.  :(

Sorry about the misguided suggestion :/