[patch 46/48] Remove low_latency flag setting from nozomi and mxser drivers

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Chuck Ebbert <cebbert@xxxxxxxxxx>

commit 4d8d4d251df8eaaa3dae71c8cfa7fbf4510d967d upstream

[ cebbert@xxxxxxxxxx: backport to 2.6.27 ]

Remove low_latency flag setting from nozomi and mxser drivers

The kernel oopses if this flag is set.

[and neither driver should set it as they call tty_flip_buffer_push from IRQ
 paths so have always been buggy]

Signed-off-by: Chuck Ebbert <cebbert@xxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---

---
 drivers/char/mxser.c  |    2 --
 drivers/char/nozomi.c |    1 -
 2 files changed, 3 deletions(-)

--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1099,8 +1099,6 @@ static int mxser_open(struct tty_struct 
 	if (retval)
 		return retval;
 
-	/* unmark here for very high baud rate (ex. 921600 bps) used */
-	tty->low_latency = 1;
 	return 0;
 }
 
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1584,7 +1584,6 @@ static int ntty_open(struct tty_struct *
 
 	/* Enable interrupt downlink for channel */
 	if (port->tty_open_count == 1) {
-		tty->low_latency = 1;
 		tty->driver_data = port;
 		port->tty = tty;
 		DBG1("open: %d", port->token_dl);


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