netdev - [net 1/1] tipc: reset bearer if device carrier not ok

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Message-ID: <1537905417-30804-1-git-send-email-jon.maloy@ericsson.com>
Date:   Tue, 25 Sep 2018 21:56:57 +0200
From:   Jon Maloy <jon.maloy@...csson.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     <gordan.mihaljevic@...tech.com.au>, <tung.q.nguyen@...tech.com.au>,
        <hoang.h.le@...tech.com.au>, <jon.maloy@...csson.com>,
        <canh.d.luu@...tech.com.au>, <ying.xue@...driver.com>,
        <tipc-discussion@...ts.sourceforge.net>
Subject: [net  1/1] tipc: reset bearer if device carrier not ok

From: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@...csson.com>

If we detect that under lying carrier detects errors and goes down,
we reset the bearer.

Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@...csson.com>
Signed-off-by: Jon Maloy <jon.maloy@...csson.com>
---
 net/tipc/bearer.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 418f03d..645c160 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -609,16 +609,18 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
 
 	switch (evt) {
 	case NETDEV_CHANGE:
-		if (netif_carrier_ok(dev))
+		if (netif_carrier_ok(dev) && netif_oper_up(dev)) {
+			test_and_set_bit_lock(0, &b->up);
 			break;
-		/* else: fall through */
-	case NETDEV_UP:
-		test_and_set_bit_lock(0, &b->up);
-		break;
+		}
+		/* fall through */
 	case NETDEV_GOING_DOWN:
 		clear_bit_unlock(0, &b->up);
 		tipc_reset_bearer(net, b);
 		break;
+	case NETDEV_UP:
+		test_and_set_bit_lock(0, &b->up);
+		break;
 	case NETDEV_CHANGEMTU:
 		if (tipc_mtu_bad(dev, 0)) {
 			bearer_disable(net, b);
-- 
2.1.4