tty: fix port buffer locking

[karo-tx-linux.git] / drivers / tty / tty_port.c

diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 0c880f17d27ee1bd145479e05548066107848077..88dac3b7936933cc7c6644451c837aa6c6585c9f 100644 (file)
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -33,7 +33,9 @@ static int tty_port_default_receive_buf(struct tty_port *port,
        if (!disc)
                return 0;
 
+       mutex_lock(&tty->atomic_write_lock);
        ret = tty_ldisc_receive_buf(disc, p, (char *)f, count);
+       mutex_unlock(&tty->atomic_write_lock);
 
        tty_ldisc_deref(disc);