Re: [PATCH -next] gpio: pxa: fix potential NULL dereference in pxa_gpio_probe()

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Wed, Jul 11, 2018 at 3:10 PM Wei Yongjun <weiyongjun1@xxxxxxxxxx> wrote:

> platform_get_resource() may fail and return NULL, so we should
> better check it's return value to avoid a NULL pointer dereference
> a bit later in the code.
>
> This is detected by Coccinelle semantic patch.
>
> @@
> expression pdev, res, n, t, e, e1, e2;
> @@
>
> res = platform_get_resource(pdev, t, n);
> + if (!res)
> +   return -EINVAL;
> ... when != res == NULL
> e = devm_ioremap(e1, res->start, e2);
>
> Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

Patch applied with Robert's ACK.

Yours,
Linus Walleij
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