Re: [PATCH v4 1/2] gpio: mxc: Protect GPIO irqchip RMW with bgpio spinlock

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Mon, Jul 25, 2022 at 12:51 AM Marek Vasut <marex@xxxxxxx> wrote:
>
> The driver currently performs register read-modify-write without locking
> in its irqchip part, this could lead to a race condition when configuring
> interrupt mode setting. Add the missing bgpio spinlock lock/unlock around
> the register read-modify-write.

...

> +       spin_lock_irqsave(&port->gc.bgpio_lock, flags);

To my surprise, is bgpio_lock not a raw spin lock?! How is it possible
to work on RT?

-- 
With Best Regards,
Andy Shevchenko