Re: [bug report] pinctrl: berlin: Don't leak memory if krealloc() fails

[Dan Carpenter <dan.carpenter@oracle.com>]

On Wed, Oct 12, 2016 at 02:36:16PM +0200, Johannes Thumshirn wrote:

> +void berlin_pinctrl_free_funcgroups(struct berlin_pinctrl *pctrl)
> +{
> +	struct berlin_desc_group const *desc_group;
> +	struct berlin_desc_function const *desc_function;
> +	int i;
> +
> +	for (i = 0; i < pctrl->desc->ngroups; i++) {
> +		desc_group = pctrl->desc->groups + i;
> +		desc_function = desc_group->functions;
> +
> +		while (desc_function->name) {
> +			struct berlin_pinctrl_function
> +				*function = pctrl->functions;
> +
> +			kfree(function->groups);

It looks like, we're just freeing pctrl->functions->groups over and
over.

Not taking advantage of managed allocations has made this stuff so much
more complicated.  I'd be tempted almost to just delete the krealloc()
and waste a little RAM...  (I have no idea how much RAM I'm talking
about here so maybe this is a bad idea).

> +			desc_function++;
> +		}
> +	}
> +}
>