linux-kernel - Re: [PATCH] iio: adc: xilinx-ams: fix devm

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Date:   Wed, 30 Nov 2022 18:04:26 +0100
From:   Michal Simek <michal.simek@....com>
To:     Marco Pagani <marpagan@...hat.com>,
        Anand Ashok Dumbre <anand.ashok.dumbre@...inx.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michal Simek <michal.simek@...inx.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Manish Narani <manish.narani@...inx.com>
CC:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <llvm@...ts.linux.dev>
Subject: Re: [PATCH] iio: adc: xilinx-ams: fix devm_krealloc() return value
 check



On 11/25/22 12:31, Marco Pagani wrote:
> CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email.
> 
> 
> The clang-analyzer reported a warning: "Value stored to 'ret'
> is never read".
> 
> Fix the return value check if devm_krealloc() fails to resize
> ams_channels.
> 
> Fixes: d5c70627a794 ("iio: adc: Add Xilinx AMS driver")
> Signed-off-by: Marco Pagani <marpagan@...hat.com>
> ---
>   drivers/iio/adc/xilinx-ams.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/xilinx-ams.c b/drivers/iio/adc/xilinx-ams.c
> index 5b4bdf3a26bb..a507d2e17079 100644
> --- a/drivers/iio/adc/xilinx-ams.c
> +++ b/drivers/iio/adc/xilinx-ams.c
> @@ -1329,7 +1329,7 @@ static int ams_parse_firmware(struct iio_dev *indio_dev)
> 
>          dev_channels = devm_krealloc(dev, ams_channels, dev_size, GFP_KERNEL);
>          if (!dev_channels)
> -               ret = -ENOMEM;
> +               return -ENOMEM;
> 
>          indio_dev->channels = dev_channels;
>          indio_dev->num_channels = num_channels;
> --
> 2.38.1
> 

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

Thanks,
Michal