[PATCH 1/2] cx20442: tty_ldisc_ops::write_wakeup is optional

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TTY layer does nothing if tty_ldisc_ops::write_wakeup is NULL, so there
is no need to implement an empty one in cx20442. Drop it.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Jaroslav Kysela <perex@xxxxxxxx>
Cc: Takashi Iwai <tiwai@xxxxxxxx>
Cc: alsa-devel@xxxxxxxxxxxxxxxx
---
 sound/soc/codecs/cx20442.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/sound/soc/codecs/cx20442.c b/sound/soc/codecs/cx20442.c
index ec8d6e74b467..65c6b92d7b5f 100644
--- a/sound/soc/codecs/cx20442.c
+++ b/sound/soc/codecs/cx20442.c
@@ -279,11 +279,6 @@ static void v253_receive(struct tty_struct *tty, const unsigned char *cp,
 	}
 }
 
-/* Line discipline .write_wakeup() */
-static void v253_wakeup(struct tty_struct *tty)
-{
-}
-
 struct tty_ldisc_ops v253_ops = {
 	.name = "cx20442",
 	.owner = THIS_MODULE,
@@ -291,7 +286,6 @@ struct tty_ldisc_ops v253_ops = {
 	.close = v253_close,
 	.hangup = v253_hangup,
 	.receive_buf = v253_receive,
-	.write_wakeup = v253_wakeup,
 };
 EXPORT_SYMBOL_GPL(v253_ops);
 
-- 
2.32.0




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