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mac80211: exit cooked monitor RX early if there are none

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If there are no cooked monitor interfaces, there's
no point in building the radiotap RX header for the
frame and iterating the interface list.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-10-21 10:22:22 +02:00 committed by John W. Linville
parent b83db862ff
commit 152c477aa3
1 changed files with 4 additions and 0 deletions
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4
net/mac80211/rx.c
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@ -2489,6 +2489,10 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
goto out_free_skb;
rx->flags |= IEEE80211_RX_CMNTR;
/* If there are no cooked monitor interfaces, just free the SKB */
if (!local->cooked_mntrs)
goto out_free_skb;
if (skb_headroom(skb) < sizeof(*rthdr) &&
pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC))
goto out_free_skb;