Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Sun, 23 Jul 2023 10:14:16 +0100
From:   Jonathan Cameron <jic23@kernel.org>
To:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc:     linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
        Lars-Peter Clausen <lars@metafoo.de>,
        Nuno Sa <nuno.sa@analog.com>
Subject: Re: [PATCH v2 4/8] iio: core: Use min() instead of min_t() to make
 code more robust
Message-ID: <20230723101416.398589b3@jic23-huawei>
In-Reply-To: <20230721170022.3461-5-andriy.shevchenko@linux.intel.com>
References: <20230721170022.3461-1-andriy.shevchenko@linux.intel.com>
        <20230721170022.3461-5-andriy.shevchenko@linux.intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Fri, 21 Jul 2023 20:00:18 +0300
Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:

> min() has strict type checking and preferred over min_t() for
> unsigned types to avoid overflow. Here it's unclear why min_t()
> was chosen since both variables are of the same type. In any
> case update to use min().
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Applied to the togreg branch of iio.git and pushed out as testing
for 0-day to give it a quick sanity check.

Thanks,

Jonathan

> ---
>  drivers/iio/industrialio-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 6e28c2a3d223..78cc67efa490 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -389,7 +389,7 @@ static ssize_t iio_debugfs_write_reg(struct file *file,
>  	char buf[80];
>  	int ret;
>  
> -	count = min_t(size_t, count, (sizeof(buf)-1));
> +	count = min(count, sizeof(buf) - 1);
>  	if (copy_from_user(buf, userbuf, count))
>  		return -EFAULT;
>