diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0438-sc16is7xx-Don-t-spin-if-no-data-received.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0438-sc16is7xx-Don-t-spin-if-no-data-received.patch | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0438-sc16is7xx-Don-t-spin-if-no-data-received.patch b/target/linux/brcm2708/patches-4.14/950-0438-sc16is7xx-Don-t-spin-if-no-data-received.patch new file mode 100644 index 0000000000..dd7fd236cb --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0438-sc16is7xx-Don-t-spin-if-no-data-received.patch @@ -0,0 +1,23 @@ +From 15cbb4515b766b5efc48bc53b1f83c4211c671a4 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Tue, 6 Nov 2018 12:57:48 +0000 +Subject: [PATCH 438/454] 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 +@@ -701,6 +701,8 @@ 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); |