linux-kernel - Re: [PATCH] rtc: zynqmp: initialize fract

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Date:   Wed, 27 Jul 2022 12:56:37 +0200
From:   Michal Simek <michal.simek@....com>
To:     <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Michal Simek <michal.simek@...inx.com>
CC:     <linux-rtc@...r.kernel.org>, kernel test robot <lkp@...el.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rtc: zynqmp: initialize fract_tick



On 7/27/22 12:00, alexandre.belloni@...tlin.com wrote:
> From: Alexandre Belloni <alexandre.belloni@...tlin.com>
> 
> fract_tick is used uninitialized when fract_offset is 0
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
>   drivers/rtc/rtc-zynqmp.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c
> index 1dd389b891fe..c9b85c838ebe 100644
> --- a/drivers/rtc/rtc-zynqmp.c
> +++ b/drivers/rtc/rtc-zynqmp.c
> @@ -203,7 +203,7 @@ static int xlnx_rtc_set_offset(struct device *dev, long offset)
>          struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev);
>          unsigned long long rtc_ppb = RTC_PPB;
>          unsigned int tick_mult = do_div(rtc_ppb, xrtcdev->freq);
> -       unsigned char fract_tick;
> +       unsigned char fract_tick = 0;
>          unsigned int calibval;
>          short int  max_tick;
>          int fract_offset;
> --
> 2.36.1
> 

Reviewed-by: Michal Simek <michal.simek@....com>

Thanks,
Michal