ASoC: cx20442: set tty->receiver_room in v253_open

Commit 79901317ce80 ("n_tty: Don't flush buffer when closing ldisc"),
introduced in v3.10, revealed a bug in the cx20442 codec driver
which has never been setting tty->receive_room on line discipline
open as it should from the beginning. Fix it.

Created and tested on Amstrad Delta against Linux-4.7-rc3

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/cx20442.c b/sound/soc/codecs/cx20442.c
index d6f4abb..fb3885f 100644 (file)
--- a/sound/soc/codecs/cx20442.c
+++ b/sound/soc/codecs/cx20442.c
@@ -226,6 +226,7 @@ static int v253_open(struct tty_struct *tty)
        if (!tty->disc_data)
                return -ENODEV;
 
+       tty->receive_room = 16;
        if (tty->ops->write(tty, v253_init, len) != len) {
                ret = -EIO;
                goto err;