[PATCH v2 17/18] n_tty: Don't wait for buffer work in read() loop

From: Peter Hurley
Date: Wed Mar 27 2013 - 07:48:18 EST


User-space read() can run concurrently with receiving from device;
waiting for receive_buf() to complete is not required.

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/tty/n_tty.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 68445c7..adccff8 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1724,7 +1724,6 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
{
struct n_tty_data *ldata = tty->disc_data;

- tty_flush_to_ldisc(tty);
if (ldata->icanon && !L_EXTPROC(tty)) {
if (ldata->canon_head != ldata->read_tail)
return 1;
--
1.8.1.2

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