127 	if (mutex_lock_interruptible(&cs->mutex)) {  in if_open()
140 	mutex_unlock(&cs->mutex);  in if_open()
155 	mutex_lock(&cs->mutex);  in if_close()
164 	mutex_unlock(&cs->mutex);  in if_close()
180 	if (mutex_lock_interruptible(&cs->mutex))  in if_ioctl()
231 	mutex_unlock(&cs->mutex);  in if_ioctl()
243 	if (mutex_lock_interruptible(&cs->mutex))  in if_tiocmget()
248 	mutex_unlock(&cs->mutex);  in if_tiocmget()
263 	if (mutex_lock_interruptible(&cs->mutex))  in if_tiocmset()
275 	mutex_unlock(&cs->mutex);  in if_tiocmset()
288 	if (mutex_lock_interruptible(&cs->mutex))  in if_write()
321 	mutex_unlock(&cs->mutex);  in if_write()
332 	if (mutex_lock_interruptible(&cs->mutex))  in if_write_room()
344 	mutex_unlock(&cs->mutex);  in if_write_room()
356 	mutex_lock(&cs->mutex);  in if_chars_in_buffer()
365 	mutex_unlock(&cs->mutex);  in if_chars_in_buffer()
376 	mutex_lock(&cs->mutex);  in if_throttle()
383 	mutex_unlock(&cs->mutex);  in if_throttle()
392 	mutex_lock(&cs->mutex);  in if_unthrottle()
399 	mutex_unlock(&cs->mutex);  in if_unthrottle()
412 	mutex_lock(&cs->mutex);  in if_set_termios()
468 	mutex_unlock(&cs->mutex);  in if_set_termios()
506 	mutex_lock(&cs->mutex);  in gigaset_if_init()
516 	mutex_unlock(&cs->mutex);  in gigaset_if_init()