> @@ -1154,8 +1154,16 @@ static int uart_get_icount(struct tty_struct *tty,
> static int uart_get_rs485_config(struct uart_port *port,
> struct serial_rs485 __user *rs485)
> {
> - if (copy_to_user(rs485, &port->rs485, sizeof(port->rs485)))
> + unsigned long flags;
> + int ret;
> +
> + spin_lock_irqsave(&port->lock, flags);
> + ret = copy_to_user(rs485, &port->rs485, sizeof(port->rs485));
> + spin_unlock_irqrestore(&port->lock, flags);
Looks good apart from this bit.. The copy needs to go to a temporary
before the lock is taken otherwise we may sleep on a pagefault with irqs
off
Alan
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