linux-kernel - [PATCH v2 2/4] n_tty: Ignore all read data when closing

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Message-Id: <1447071353-2961-3-git-send-email-peter@hurleysoftware.com>
Date:	Mon,  9 Nov 2015 07:15:51 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, netdev@...r.kernel.org,
	Johannes Stezenbach <js@...21.net>,
	Karsten Keil <isdn@...ux-pingi.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Mikael Starvik <starvik@...s.com>,
	Jiri Kosina <jikos@...nel.org>,
	David Sterba <dsterba@...e.com>,
	Mark Hounschell <markh@...pro.net>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v2 2/4] n_tty: Ignore all read data when closing

On final port close (and thus final tty close), only output flow
control requests in the input data should be processed. Ignore all
other input data, including parity errors, overruns and breaks.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/n_tty.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index bc613b8..2de0283 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1564,8 +1564,6 @@ n_tty_receive_buf_closing(struct tty_struct *tty, const unsigned char *cp,
 			flag = *fp++;
 		if (likely(flag == TTY_NORMAL))
 			n_tty_receive_char_closing(tty, *cp++);
-		else
-			n_tty_receive_char_flagged(tty, *cp++, flag);
 	}
 }
 
-- 
2.6.3

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