netdev - [PATCHv2 6/7] mISDN: Layer1 statemachine fix

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Message-Id: <1336060052-27119-7-git-send-email-kkeil@linux-pingi.de>
Date:	Thu,  3 May 2012 17:47:31 +0200
From:	Karsten Keil <kkeil@...ux-pingi.de>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Karsten Keil <isdn@...ux-pingi.de>
Subject: [PATCHv2 6/7] mISDN: Layer1 statemachine fix

From: Karsten Keil <isdn@...ux-pingi.de>

The timer3 and the activation delay timer need to be
independent.
If timer3 fires do not reqest power up we have to send only INFO 0.
Now layer1 pass TBR3 again.

Signed-off-by: Karsten Keil <kkeil@...ux-pingi.de>
---
 drivers/isdn/mISDN/layer1.c |   24 ++++++++++++++----------
 1 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/isdn/mISDN/layer1.c b/drivers/isdn/mISDN/layer1.c
index ff05153..98a455d 100644
--- a/drivers/isdn/mISDN/layer1.c
+++ b/drivers/isdn/mISDN/layer1.c
@@ -28,7 +28,8 @@ static u_int *debug;
 struct layer1 {
 	u_long Flags;
 	struct FsmInst l1m;
-	struct FsmTimer timer;
+	struct FsmTimer timer3;
+	struct FsmTimer timerX;
 	int delay;
 	int t3_value;
 	struct dchannel *dch;
@@ -135,7 +136,7 @@ l1_deact_req_s(struct FsmInst *fi, int event, void *arg)
 	struct layer1 *l1 = fi->userdata;
 
 	mISDN_FsmChangeState(fi, ST_L1_F3);
-	mISDN_FsmRestartTimer(&l1->timer, 550, EV_TIMER_DEACT, NULL, 2);
+	mISDN_FsmRestartTimer(&l1->timerX, 550, EV_TIMER_DEACT, NULL, 2);
 	test_and_set_bit(FLG_L1_DEACTTIMER, &l1->Flags);
 }
 
@@ -180,11 +181,11 @@ l1_info4_ind(struct FsmInst *fi, int event, void *arg)
 	mISDN_FsmChangeState(fi, ST_L1_F7);
 	l1->dcb(l1->dch, INFO3_P8);
 	if (test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags))
-		mISDN_FsmDelTimer(&l1->timer, 4);
+		mISDN_FsmDelTimer(&l1->timerX, 4);
 	if (!test_bit(FLG_L1_ACTIVATED, &l1->Flags)) {
 		if (test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags))
-			mISDN_FsmDelTimer(&l1->timer, 3);
-		mISDN_FsmRestartTimer(&l1->timer, 110, EV_TIMER_ACT, NULL, 2);
+			mISDN_FsmDelTimer(&l1->timer3, 3);
+		mISDN_FsmRestartTimer(&l1->timerX, 110, EV_TIMER_ACT, NULL, 2);
 		test_and_set_bit(FLG_L1_ACTTIMER, &l1->Flags);
 	}
 }
@@ -200,9 +201,9 @@ l1_timer3(struct FsmInst *fi, int event, void *arg)
 			l1->dcb(l1->dch, HW_D_NOBLOCKED);
 		l1->dcb(l1->dch, PH_DEACTIVATE_IND);
 	}
-	if (l1->l1m.state != ST_L1_F6) {
+	if (l1->l1m.state != ST_L1_F6) { /* stay in F6 */
 		mISDN_FsmChangeState(fi, ST_L1_F3);
-		l1->dcb(l1->dch, HW_POWERUP_REQ);
+		/* do not force anything here, we need send INFO 0 */
 	}
 }
 
@@ -234,8 +235,9 @@ l1_activate_s(struct FsmInst *fi, int event, void *arg)
 {
 	struct layer1 *l1 = fi->userdata;
 
-	mISDN_FsmRestartTimer(&l1->timer, l1->t3_value, EV_TIMER3, NULL, 2);
+	mISDN_FsmRestartTimer(&l1->timer3, l1->t3_value, EV_TIMER3, NULL, 2);
 	test_and_set_bit(FLG_L1_T3RUN, &l1->Flags);
+	/* Tell HW to send INFO 1 */
 	l1->dcb(l1->dch, HW_RESET_REQ);
 }
 
@@ -303,7 +305,8 @@ static struct FsmNode L1SFnList[] =
 
 static void
 release_l1(struct layer1 *l1) {
-	mISDN_FsmDelTimer(&l1->timer, 0);
+	mISDN_FsmDelTimer(&l1->timerX, 0);
+	mISDN_FsmDelTimer(&l1->timer3, 0);
 	if (l1->dch)
 		l1->dch->l1 = NULL;
 	module_put(THIS_MODULE);
@@ -395,7 +398,8 @@ create_l1(struct dchannel *dch, dchannel_l1callback *dcb) {
 	nl1->l1m.printdebug = l1m_debug;
 	nl1->dch = dch;
 	nl1->dcb = dcb;
-	mISDN_FsmInitTimer(&nl1->l1m, &nl1->timer);
+	mISDN_FsmInitTimer(&nl1->l1m, &nl1->timer3);
+	mISDN_FsmInitTimer(&nl1->l1m, &nl1->timerX);
 	__module_get(THIS_MODULE);
 	dch->l1 = nl1;
 	return 0;
-- 
1.7.3.4

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