Re: [PATCH 1/2] extcon: Use BIT() macro for the left-shift operation

[Andy Shevchenko]

On Thu, Mar 30, 2017 at 11:39 AM, Chanwoo Choi <cw00.choi@xxxxxxxxxxx> wrote:
> This patch just uses the BIT() macro to make the code simple.

>         for (i = 0; i < edev->max_supported; i++) {
>                 count += sprintf(buf + count, "%s=%d\n",
>                                 extcon_info[edev->supported_cable[i]].name,
> -                                !!(edev->state & (1 << i)));
> +                                !!(edev->state & BIT(i)));
>         }

While change is okay, the above code is fragile. There is a potential
buffer overflow.

-- 
With Best Regards,
Andy Shevchenko