linux-kernel - [PATCH 4.13 007/160] net: bonding: fix tlb_dynamic

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Date:   Tue, 10 Oct 2017 21:48:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Mahesh Bandewar <maheshb@...gle.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.13 007/160] net: bonding: fix tlb_dynamic_lb default value

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

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

From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>


[ Upstream commit f13ad104b4e886a03e75f130daf579ef9bf33dfc ]

Commit 8b426dc54cf4 ("bonding: remove hardcoded value") changed the
default value for tlb_dynamic_lb which lead to either broken ALB mode
(since tlb_dynamic_lb can be changed only in TLB) or setting TLB mode
with tlb_dynamic_lb equal to 0.
The first issue was recently fixed by setting tlb_dynamic_lb to 1 always
when switching to ALB mode, but the default value is still wrong and
we'll enter TLB mode with tlb_dynamic_lb equal to 0 if the mode is
changed via netlink or sysfs. In order to restore the previous behaviour
and default value simply remove the mode check around the default param
initialization for tlb_dynamic_lb which will always set it to 1 as
before.

Fixes: 8b426dc54cf4 ("bonding: remove hardcoded value")
Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Acked-by: Mahesh Bandewar <maheshb@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/bonding/bond_main.c |   17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4289,7 +4289,7 @@ static int bond_check_params(struct bond
 	int bond_mode	= BOND_MODE_ROUNDROBIN;
 	int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
 	int lacp_fast = 0;
-	int tlb_dynamic_lb = 0;
+	int tlb_dynamic_lb;
 
 	/* Convert string parameters. */
 	if (mode) {
@@ -4601,16 +4601,13 @@ static int bond_check_params(struct bond
 	}
 	ad_user_port_key = valptr->value;
 
-	if ((bond_mode == BOND_MODE_TLB) || (bond_mode == BOND_MODE_ALB)) {
-		bond_opt_initstr(&newval, "default");
-		valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB),
-					&newval);
-		if (!valptr) {
-			pr_err("Error: No tlb_dynamic_lb default value");
-			return -EINVAL;
-		}
-		tlb_dynamic_lb = valptr->value;
+	bond_opt_initstr(&newval, "default");
+	valptr = bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB), &newval);
+	if (!valptr) {
+		pr_err("Error: No tlb_dynamic_lb default value");
+		return -EINVAL;
 	}
+	tlb_dynamic_lb = valptr->value;
 
 	if (lp_interval == 0) {
 		pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",