From ca73a892c5bec4b08a2fa22b3015e98ed905abb7 Mon Sep 17 00:00:00 2001 From: John Ogness Date: Thu, 25 May 2023 11:37:54 +0206 Subject: [PATCH] serial: 8250: lock port for stop_rx() in omap8250_irq() The uarts_ops stop_rx() callback expects that the port->lock is taken and interrupts are disabled. Fixes: 1fe0e1fa3209 ("serial: 8250_omap: Handle optional overrun-throttle-ms property") Signed-off-by: John Ogness Reviewed-by: Tony Lindgren Link: https://lore.kernel.org/r/20230525093159.223817-4-john.ogness@linutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_omap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index fbca069..c17d981 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -658,7 +658,9 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id) up->ier = port->serial_in(port, UART_IER); if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) { + spin_lock(&port->lock); port->ops->stop_rx(port); + spin_unlock(&port->lock); } else { /* Keep restarting the timer until * the input overrun subsides. -- 2.7.4