mac80211: Fixing slow IBSS rejoin

[linux-2.6] / net / mac80211 / iface.c

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 80954a512185ca66ab65bbc087bce1b8f3a0b743..06e88a5a036d2ebce586a94f0bf7a635ca8a6405 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -54,6 +54,15 @@ 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;