| From 55b04ba6f5257f70ed806a1c7b93008dd1f5a515 Mon Sep 17 00:00:00 2001 |
| From: Phil Elwell <phil@raspberrypi.org> |
| Date: Tue, 6 Nov 2018 12:57:48 +0000 |
| Subject: [PATCH] sc16is7xx: Don't spin if no data received |
| |
| See: https://github.com/raspberrypi/linux/issues/2676 |
| |
| Signed-off-by: Phil Elwell <phil@raspberrypi.org> |
| --- |
| drivers/tty/serial/sc16is7xx.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/drivers/tty/serial/sc16is7xx.c |
| +++ b/drivers/tty/serial/sc16is7xx.c |
| @@ -696,6 +696,8 @@ static bool sc16is7xx_port_irq(struct sc |
| rxlen = sc16is7xx_port_read(port, SC16IS7XX_RXLVL_REG); |
| if (rxlen) |
| sc16is7xx_handle_rx(port, rxlen, iir); |
| + else |
| + return false; |
| break; |
| case SC16IS7XX_IIR_THRI_SRC: |
| sc16is7xx_handle_tx(port); |