netdev - [PATCH] vlan: Make it possible to add vlan with id 4095

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Message-ID: <20120928123258.9454.95197.stgit@localhost.localdomain>
Date:	Fri, 28 Sep 2012 15:32:58 +0300
From:	Paulius Zaleckas <paulius.zaleckas@...il.com>
To:	kaber@...sh.net, netdev@...r.kernel.org
Subject: [PATCH] vlan: Make it possible to add vlan with id 4095

vconfig help tells that vlan_id should be 0-4095, but fails
with 4095.

There is an off-by-one bug while evaluating vlan_id.
Fix it by evaluating against count(4096), not mask(0x0fff = 4095).

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@...il.com>
---

 net/8021q/vlan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 9096bcb..9e528bf 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -199,7 +199,7 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 	char name[IFNAMSIZ];
 	int err;
 
-	if (vlan_id >= VLAN_VID_MASK)
+	if (vlan_id >= VLAN_N_VID)
 		return -ERANGE;
 
 	err = vlan_check_real_dev(real_dev, vlan_id);

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