Am Freitag, 9. Dezember 2011, 02:15:17 schrieb Thilo-Alexander Ginkel:
> 555 static void acm_tty_hangup(struct tty_struct *tty)
> 556 {
> 557 »···struct acm *acm = tty->driver_data;
> 558 »···tty_port_hangup(&acm->port);
> 559 »···mutex_lock(&open_mutex);
> 560 »···acm_port_down(acm);
> 561 »···mutex_unlock(&open_mutex);
> 562 }
>
> Another idea that came to my mind: If data transmission is in progress
> when the suspend happens (as indicated by acm->transmitting), what are
> the effects of returning EBUSY (just in case the suspend is an auto
> suspend - under which circumstances do these happen?)? May this cause
> trouble on resume?
Returning -EBUSY will make the driver core again wait an autosuspend period
and then retry the autosuspend.
Regards
Oliver
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