[PATCH net 2/3] bonding:check mode when modify primary_reselect

[Weiping Pan <wpan@redhat.com>]

Using a primary_reselect only makes sense in active backup, TLB or ALB modes.

Signed-off-by: Weiping Pan <wpan@redhat.com>
---
 drivers/net/bonding/bond_sysfs.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 485bedb..1b0f3cd 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1123,6 +1123,13 @@ static ssize_t bonding_store_primary_reselect(struct device *d,
 	if (!rtnl_trylock())
 		return restart_syscall();
 
+	if (!USES_PRIMARY(bond->params.mode)) {
+		pr_err("%s: Unable to set primary_reselect; %s is in mode %d\n",
+			bond->dev->name, bond->dev->name, bond->params.mode);
+		ret = -EINVAL;
+		goto out;
+	}
+
 	new_value = bond_parse_parm(buf, pri_reselect_tbl);
 	if (new_value < 0)  {
 		pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
-- 
1.7.4