[patch 13/23] Fix SET_VLAN_INGRESS_PRIORITY_CMD error return.

[Greg KH <gregkh@suse.de>]

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

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

From: Patrick McHardy <kaber@trash.net>

patch fffe470a803e7f7b74c016291e542a0162761209 in mainline.

[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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 net/8021q/vlan.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -744,6 +744,7 @@ static int vlan_ioctl_handler(void __use
 		vlan_dev_set_ingress_priority(dev,
 					      args.u.skb_priority,
 					      args.vlan_qos);
+		err = 0;
 		break;
 
 	case SET_VLAN_EGRESS_PRIORITY_CMD:

--