linux-kernel - Re: n_tty_write() going into schedule but NOT coming out

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Date:	Wed, 03 Apr 2013 09:44:15 +0400
From:	Ilya Zykov <linux@...k.ru>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
CC:	lkml <linux-kernel@...r.kernel.org>, linux-serial@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Peter Hurley <peter@...leysoftware.com>
Subject: Re: n_tty_write() going into schedule but NOT coming out

Please, try this patch maybe it can help localize your problem.

 drivers/tty/n_tty.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 05e72be..28f15d0 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -230,6 +230,7 @@ static void reset_buffer_flags(struct tty_struct *tty)
 	ldata->canon_head = ldata->canon_data = ldata->erasing = 0;
 	bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
 	n_tty_set_room(tty);
+	check_unthrottle(tty);
 }
 
 /**
--
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