linux-kernel - [ 030/175] tty: moxa: fix bit test in moxa

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Message-Id: <20120330194830.310842692@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:48:55 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Dan Carpenter <dan.carpenter@...cle.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [ 030/175] tty: moxa: fix bit test in moxa_start()

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 58112dfbfe02d803566a2c6c8bd97b5fa3c62cdc upstream.

This is supposed to be doing a shift before the comparison instead of
just doing a bitwise AND directly.  The current code means the start()
just returns without doing anything.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Jiri Slaby <jslaby@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/moxa.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1331,7 +1331,7 @@ static void moxa_start(struct tty_struct
 	if (ch == NULL)
 		return;
 
-	if (!(ch->statusflags & TXSTOPPED))
+	if (!test_bit(TXSTOPPED, &ch->statusflags))
 		return;
 
 	MoxaPortTxEnable(ch);


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