From da4e40e271a30ecf8b87f70619cca93c25ed0199 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 26 Aug 2011 11:26:00 +0100 Subject: [PATCH] max3110: Fix up port->tty backreferencing We want to keep refcounts properly on this against hangup. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mrst_max3110.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c index 42aa43934b2..1aa2c3cd214 100644 --- a/drivers/tty/serial/mrst_max3110.c +++ b/drivers/tty/serial/mrst_max3110.c @@ -347,7 +347,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) if (!port->state) return 0; - tty = port->state->port.tty; + tty = tty_port_tty_get(&port->state->port); if (!tty) return 0; @@ -364,8 +364,10 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) } } - if (!w) + if (!w) { + tty_kref_put(tty); return 0; + } for (r = 0; w; r += usable, w -= usable) { usable = tty_buffer_request_room(tty, w); @@ -375,6 +377,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len) } } tty_flip_buffer_push(tty); + tty_kref_put(tty); return r; } -- 2.46.0