On Fri, Nov 23, 2012 at 10:27:12AM +0800, Qing Xu wrote:

> But, in fact, it is not necessary to initialize regulator_idx.

>         for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
>                 ri = &max8925_regulator_info[i];
>                 if (ri->vol_reg == res->start) {

> ****** if regulator_idx can not get a match "i" here, it will return
> -EINVAL in below code

>                         regulator_idx = i;
>                         break;
>                 }
>         }

>         if (i == ARRAY_SIZE(max8925_regulator_info)) {
>                 dev_err(&pdev->dev, "Failed to find regulator %llu\n",
>                         (unsigned long long)res->start);
>                 return -EINVAL;
>         }

> How to solve such compiler warning?

Typically by reporting a compiler bug, though sometimes in the process
of doing that one finds out that there's some non-obvious way in which
the code can break.