Commit f3994ece authored by Johannes Berg's avatar Johannes Berg Committed by David S. Miller

mac80211: assign needed_headroom/tailroom for netdevs

This assigns the netdev's needed_headroom/tailroom members to take
advantage of pre-allocated space for 802.11 headers.
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f5184d26
......@@ -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;
......
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