From 58c600f728f2787e905eff2f678fa9cf09694004 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Fri, 2 Feb 2024 15:41:29 +0000 Subject: [PATCH 1274/1295] serial: sc16is7xx: Don't spin if no data received There are multiple causes of interrupts, errors being one, and only the receipt of data warrants continued polling. 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 @@ -762,6 +762,8 @@ static bool sc16is7xx_port_irq(struct sc if (rxlen) sc16is7xx_handle_rx(port, rxlen, iir); + else + rc = false; break; /* CTSRTS interrupt comes only when CTS goes inactive */ case SC16IS7XX_IIR_CTSRTS_SRC: