linux-kernel - [ 39/82] mISDN: Bugfix for layer2 fixed TEI mode

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Date:	Mon, 13 Aug 2012 13:19:15 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Karsten Keil <keil@...systems.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 39/82] mISDN: Bugfix for layer2 fixed TEI mode

From: Greg KH <gregkh@...uxfoundation.org>

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

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

From: Karsten Keil <keil@...systems.de>

commit 25099335944a23db75d4916644122c746684e093 upstream.

If a fixed TEI is used, the initial state of the layer 2 statmachine need to be
4 (TEI assigned). This was true only for Point to Point connections, but not
for the other fixed TEIs. It was not found before, because usually only the
TEI 0 is used as fixed TEI for PtP mode, but if you try X31 packet mode
connections with SAPI 16, TEI 1, it did fail.

Signed-off-by: Karsten Keil <keil@...systems.de>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/isdn/mISDN/layer2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -2222,7 +2222,7 @@ create_l2(struct mISDNchannel *ch, u_int
 	InitWin(l2);
 	l2->l2m.fsm = &l2fsm;
 	if (test_bit(FLG_LAPB, &l2->flag) ||
-	    test_bit(FLG_PTP, &l2->flag) ||
+	    test_bit(FLG_FIXED_TEI, &l2->flag) ||
 	    test_bit(FLG_LAPD_NET, &l2->flag))
 		l2->l2m.state = ST_L2_4;
 	else

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