Re: [PATCH] USB: cdc-acm: fix racy TIOCMIWAIT implementation

[Oliver Neukum]

On 07.09.26 08:55, Johan Hovold wrote:
> The wakeup condition needs to be checked after adding the task to the
> waitqueue and updating the task state to avoid missing a racing modem
> status update or disconnect.

I am sorry, but in this case I have to ask:
Isn't TIOCMIWAIT inherently racy against the hardware?

	Regards
		Oliver