This is a note to let you know that I've just added the patch titled
n_tty: Ensure reader restarts worker for next reader
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
n_tty-ensure-reader-restarts-worker-for-next-reader.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 42458f41d08f0873299e830464c1232a6839297d Mon Sep 17 00:00:00 2001
From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Date: Thu, 7 Nov 2013 13:59:46 -0500
Subject: n_tty: Ensure reader restarts worker for next reader
From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
commit 42458f41d08f0873299e830464c1232a6839297d upstream.
A departing reader must restart a flush_to_ldisc() worker _before_
the next reader enters the read loop; this is to avoid the new reader
concluding no more i/o is available and prematurely exiting, when the
old reader simply hasn't re-started the worker yet.
Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/n_tty.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2253,6 +2253,9 @@ static ssize_t n_tty_read(struct tty_str
if (time)
timeout = time;
}
+ n_tty_set_room(tty);
+ up_read(&tty->termios_rwsem);
+
mutex_unlock(&ldata->atomic_read_lock);
remove_wait_queue(&tty->read_wait, &wait);
@@ -2263,8 +2266,6 @@ static ssize_t n_tty_read(struct tty_str
if (b - buf)
retval = b - buf;
- n_tty_set_room(tty);
- up_read(&tty->termios_rwsem);
return retval;
}
Patches currently in stable-queue which might be from peter@xxxxxxxxxxxxxxxxxx are
queue-3.12/n_tty-fix-4096-byte-canonical-reads.patch
queue-3.12/tty-incorrect-test-of-echo_buf-result-for-echo_op_start.patch
queue-3.12/n_tty-ensure-reader-restarts-worker-for-next-reader.patch
queue-3.12/tty-reset-hupped-state-on-open.patch
queue-3.12/n_tty-fix-echo-overrun-tail-computation.patch
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