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authorDavid S. Miller <davem@davemloft.net>2021-04-26 12:00:00 -0700
committerDavid S. Miller <davem@davemloft.net>2021-04-26 12:00:00 -0700
commit6876a18d3361e1893187970e1881a1d88d894d3f (patch)
treec79dfb4843b82d9346cae1dce68d9b1cfece1715 /net/8021q
parent0ea1041bfa3aa2971f858edd9e05477c2d3d54a0 (diff)
parentbbd6f0a948139970f4a615dff189d9a503681a39 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Diffstat (limited to 'net/8021q')
-rw-r--r--net/8021q/vlan.c3
-rw-r--r--net/8021q/vlan.h4
2 files changed, 7 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 8b644113715e..fb3d3262dc1a 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -71,6 +71,9 @@ static int vlan_group_prealloc_vid(struct vlan_group *vg,
if (array == NULL)
return -ENOBUFS;
+ /* paired with smp_rmb() in __vlan_group_get_device() */
+ smp_wmb();
+
vg->vlan_devices_arrays[pidx][vidx] = array;
return 0;
}
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 953405362795..fa3ad3d4d58c 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -57,6 +57,10 @@ static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
array = vg->vlan_devices_arrays[pidx]
[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
+
+ /* paired with smp_wmb() in vlan_group_prealloc_vid() */
+ smp_rmb();
+
return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
}