Re: [RFC PATCH V2 5/8] irqchip/gic: Return an error if GIC initialisation fails

[Linus Walleij]

On Thu, Dec 17, 2015 at 11:48 AM, Jon Hunter <jonathanh@xxxxxxxxxx> wrote:

> If the GIC initialisation fails, then currently we do not return an error
> or clean-up afterwards. Although for root controllers, this failure may be
> fatal anyway, for secondary controllers, it may not be fatal and so return
> an error on failure and clean-up.
>
> Also for non-banked GIC controllers, make sure that we free any memory
> allocated if we fail to initialise the IRQ domain.
>
> Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
(...)

Almost perfect but...

> +err:
> +       if (IS_ENABLED(CONFIG_GIC_NON_BANKED) && percpu_offset) {
> +               free_percpu(gic->dist_base.percpu_base);
> +               free_percpu(gic->cpu_base.percpu_base);

What if the first map worked but not the second?

Should it be:

if (gic->dist_base.percpu_base)
   free_percpu(gic->dist_base.percpu_base);
if (gic->cpu_base.percpu_base)
   free_percpu(gic->cpu_base.percpu_base);

?

Yours,
Linus Walleij
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