From: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Date: Tue, 20 Aug 2013 08:10:18 +0000 (+0900)
Subject: bridge: Use the correct bit length for bitmap functions in the VLAN code
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ef40b7ef181b7b1a24df2ef2d1ef84956bffa635;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

bridge: Use the correct bit length for bitmap functions in the VLAN code

The VLAN code needs to know the length of the per-port VLAN bitmap to
perform its most basic operations (retrieving VLAN informations, removing
VLANs, forwarding database manipulation, etc). Unfortunately, in the
current implementation we are using a macro that indicates the bitmap
size in longs in places where the size in bits is expected, which in
some cases can cause what appear to be random failures.
Use the correct macro.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 60aca9109a50..ffd5874f2592 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -161,7 +161,7 @@ void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
 	if (!pv)
 		return;
 
-	for_each_set_bit_from(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+	for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) {
 		f = __br_fdb_get(br, br->dev->dev_addr, vid);
 		if (f && f->is_local && !f->dst)
 			fdb_delete(br, f);
@@ -730,7 +730,7 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 		/* VID was specified, so use it. */
 		err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
 	} else {
-		if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
 			err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
 			goto out;
 		}
@@ -739,7 +739,7 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 		 * specify a VLAN.  To be nice, add/update entry for every
 		 * vlan on this port.
 		 */
-		for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
 			err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
 			if (err)
 				goto out;
@@ -817,7 +817,7 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 
 		err = __br_fdb_delete(p, addr, vid);
 	} else {
-		if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
 			err = __br_fdb_delete(p, addr, 0);
 			goto out;
 		}
@@ -827,7 +827,7 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 		 * vlan on this port.
 		 */
 		err = -ENOENT;
-		for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
 			err &= __br_fdb_delete(p, addr, vid);
 		}
 	}
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 1fc30abd3a52..b9259efa636e 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -132,7 +132,7 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 		else
 			pv = br_get_vlan_info(br);
 
-		if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN))
+		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
 			goto done;
 
 		af = nla_nest_start(skb, IFLA_AF_SPEC);
@@ -140,7 +140,7 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 			goto nla_put_failure;
 
 		pvid = br_get_pvid(pv);
-		for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) {
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
 			vinfo.vid = vid;
 			vinfo.flags = 0;
 			if (vid == pvid)
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index bd58b45f5f90..9a9ffe7e4019 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -108,7 +108,7 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid)
 
 	clear_bit(vid, v->vlan_bitmap);
 	v->num_vlans--;
-	if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) {
+	if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
 		if (v->port_idx)
 			rcu_assign_pointer(v->parent.port->vlan_info, NULL);
 		else
@@ -122,7 +122,7 @@ static void __vlan_flush(struct net_port_vlans *v)
 {
 	smp_wmb();
 	v->pvid = 0;
-	bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN);
+	bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
 	if (v->port_idx)
 		rcu_assign_pointer(v->parent.port->vlan_info, NULL);
 	else