From 2e948218b7c1262a3830823d6620eb227e3d4e3a Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 13 Dec 2018 19:44:42 +0100 Subject: serial: sh-sci: Fix crash in rx_timer_fn() on PIO fallback When falling back to PIO, active_rx must be set to a different value than cookie_rx[i], else sci_dma_rx_find_active() will incorrectly find a match, leading to a NULL pointer dereference in rx_timer_fn() later. Use zero instead, which is the same value as after driver initialization. Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sh-sci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 2a08039f7922..e353e03ce260 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1369,7 +1369,7 @@ fail: dmaengine_terminate_async(chan); for (i = 0; i < 2; i++) s->cookie_rx[i] = -EINVAL; - s->active_rx = -EINVAL; + s->active_rx = 0; s->chan_rx = NULL; sci_start_rx(port); if (!port_lock_held) -- cgit v1.2.3