[PATCH v2 2/2] console: Don't start/stop console if stdio device invalid

[Andy Shevchenko]

On Thu, Jan 28, 2021 at 02:12:40PM +0100, Nicolas Saenz Julienne wrote:
> Don't start/stop an stdio device that might have been already freed.
> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne at suse.de>
> Fixes: 70c2525c0d3c ("IOMUX: Stop dropped consoles")

...

> +	/*
> +	 * TODO: This is a workaround to avoid accessing freed memory:
> +	 * console_stop() might be called on an stdio_dev that has already been
> +	 * de-registered, due to the fact that stdio_deregister_dev()
> +	 * doesn't update the global console_devices array.
> +	 */

I see now. I think I have experienced this issue from time to time. I will look
at it. Tom, Simon, please hold on applying these for a while.

> +	if (!stdio_valid(sdev))
> +		return false;

-- 
With Best Regards,
Andy Shevchenko