diff options
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index dfb28c7c3069..a1933a86aee0 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -864,6 +864,19 @@ static unsigned int acm_tty_write_room(struct tty_struct *tty) return acm_wb_is_avail(acm) ? acm->writesize : 0; } +static void acm_tty_flush_buffer(struct tty_struct *tty) +{ + struct acm *acm = tty->driver_data; + unsigned long flags; + int i; + + spin_lock_irqsave(&acm->write_lock, flags); + for (i = 0; i < ACM_NW; i++) + if (acm->wb[i].use) + usb_unlink_urb(acm->wb[i].urb); + spin_unlock_irqrestore(&acm->write_lock, flags); +} + static unsigned int acm_tty_chars_in_buffer(struct tty_struct *tty) { struct acm *acm = tty->driver_data; @@ -2027,6 +2040,7 @@ static const struct tty_operations acm_ops = { .hangup = acm_tty_hangup, .write = acm_tty_write, .write_room = acm_tty_write_room, + .flush_buffer = acm_tty_flush_buffer, .ioctl = acm_tty_ioctl, .throttle = acm_tty_throttle, .unthrottle = acm_tty_unthrottle, |