From 1f9195cda30b320038cf94b4d14f85e58dd69d6d Mon Sep 17 00:00:00 2001 From: Phil Elwell 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 --- drivers/tty/serial/sc16is7xx.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -770,6 +770,8 @@ 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; /* CTSRTS interrupt comes only when CTS goes inactive */ case SC16IS7XX_IIR_CTSRTS_SRC: