| Message ID | 1437070920-28069-25-git-send-email-geert+renesas@glider.be (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 9714fc1b72b3cf8c..dda1f7b13497817a 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1846,12 +1846,16 @@ static void sci_shutdown(struct uart_port *port) { struct sci_port *s = to_sci_port(port); unsigned long flags; + u16 scscr; dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); spin_lock_irqsave(&port->lock, flags); sci_stop_rx(port); sci_stop_tx(port); + scscr = serial_port_in(port, SCSCR); + scscr &= ~(SCSCR_TE | SCSCR_RE); + serial_port_out(port, SCSCR, scscr); spin_unlock_irqrestore(&port->lock, flags); sci_free_dma(port);
Make sure the transmitter and receiver are stopped when shutting down the port, to avoid new RX DMA requests to arrive. Inspired by a patch in the BSP by Koji Matsuoka <koji.matsuoka.xm@renesas.com>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- drivers/tty/serial/sh-sci.c | 4 ++++ 1 file changed, 4 insertions(+)