[VLAN]: Fix SET_VLAN_INGRESS_PRIORITY_CMD ioctl

Based on report and patch by Doug Kehn <rdkehn@yahoo.com>:

vconfig returns the following error when attempting to execute the
set_ingress_map command:

vconfig: socket or ioctl error for set_ingress_map: Operation not permitted

In vlan.c, vlan_ioctl_handler for SET_VLAN_INGRESS_PRIORITY_CMD
sets err = -EPERM and calls vlan_dev_set_ingress_priority.
vlan_dev_set_ingress_priority is a void function so err remains
at -EPERM and results in the vconfig error (even though the ingress
map was set).

Fix by setting err = 0 after the vlan_dev_set_ingress_priority call.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 3fe4fc86055faa4765701c3e36f88fed043cfaeb..1037748c14db0dbaee28ed4709eed462061a68d8 100644 (file)
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -747,6 +747,7 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
                vlan_dev_set_ingress_priority(dev,
                                              args.u.skb_priority,
                                              args.vlan_qos);
+               err = 0;
                break;
 
        case SET_VLAN_EGRESS_PRIORITY_CMD: