From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Martin Schiller <ms@dev.tdt.de>, Jakub Kicinski <kuba@kernel.org>,
Sasha Levin <sashal@kernel.org>,
linux-x25@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 075/130] net/lapb: fix t1 timer handling for LAPB_STATE_0
Date: Tue, 22 Dec 2020 21:17:18 -0500 [thread overview]
Message-ID: <20201223021813.2791612-75-sashal@kernel.org> (raw)
In-Reply-To: <20201223021813.2791612-1-sashal@kernel.org>
From: Martin Schiller <ms@dev.tdt.de>
[ Upstream commit 62480b992ba3fb1d7260b11293aed9d6557831c7 ]
1. DTE interface changes immediately to LAPB_STATE_1 and start sending
SABM(E).
2. DCE interface sends N2-times DM and changes to LAPB_STATE_1
afterwards if there is no response in the meantime.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/lapb/lapb_timer.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/net/lapb/lapb_timer.c b/net/lapb/lapb_timer.c
index 8f5b17001a076..baa247fe4ed05 100644
--- a/net/lapb/lapb_timer.c
+++ b/net/lapb/lapb_timer.c
@@ -85,11 +85,18 @@ static void lapb_t1timer_expiry(struct timer_list *t)
switch (lapb->state) {
/*
- * If we are a DCE, keep going DM .. DM .. DM
+ * If we are a DCE, send DM up to N2 times, then switch to
+ * STATE_1 and send SABM(E).
*/
case LAPB_STATE_0:
- if (lapb->mode & LAPB_DCE)
+ if (lapb->mode & LAPB_DCE &&
+ lapb->n2count != lapb->n2) {
+ lapb->n2count++;
lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE);
+ } else {
+ lapb->state = LAPB_STATE_1;
+ lapb_establish_data_link(lapb);
+ }
break;
/*
--
2.27.0
next parent reply other threads:[~2020-12-23 2:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201223021813.2791612-1-sashal@kernel.org>
2020-12-23 2:17 ` Sasha Levin [this message]
2020-12-23 17:01 ` [PATCH AUTOSEL 5.4 075/130] net/lapb: fix t1 timer handling for LAPB_STATE_0 Xie He
2020-12-24 9:49 ` Xie He
2020-12-27 21:27 ` Sasha Levin
2021-01-06 7:33 ` Martin Schiller
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