1 files changed, 9 insertions, 0 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index f41c7e0de622..4a8062f8b1cc 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -53,6 +53,15 @@ int ieee80211_if_add(struct net_device *dev, const char *name,
         if (!ndev)
                 return -ENOMEM;
 
+        ndev->needed_headroom = local->tx_headroom +
+                                4*6 /* four MAC addresses */
+                                + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
+                                + 6 /* mesh */
+                                + 8 /* rfc1042/bridge tunnel */
+                                - ETH_HLEN /* ethernet hard_header_len */
+                                + IEEE80211_ENCRYPT_HEADROOM;
+        ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
+
         ret = dev_alloc_name(ndev, ndev->name);
         if (ret < 0)
                 goto fail;