Hi, stanse found a locking error in lirc_dev_fop_read: if (mutex_lock_interruptible(&ir->irctl_lock)) return -ERESTARTSYS; ... while (written < length && ret == 0) { if (mutex_lock_interruptible(&ir->irctl_lock)) { #1 ret = -ERESTARTSYS; break; } ... } remove_wait_queue(&ir->buf->wait_poll, &wait); set_current_state(TASK_RUNNING); mutex_unlock(&ir->irctl_lock); #2 If lock at #1 fails, it beaks out of the loop, with the lock unlocked, but there is another "unlock" at #2. regards, -- js -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html