diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2010-12-18 19:30:49 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-12-20 20:52:17 +0100 |
| commit | 4cd06a344db752f513437138953af191cbe9a691 (patch) | |
| tree | ec6a52da07449e20a10e59f2ee669467dd56089e /net | |
| parent | mac80211: fix initialization of skb->cb in ieee80211_subif_start_xmit (diff) | |
| download | linux-4cd06a344db752f513437138953af191cbe9a691.tar.xz linux-4cd06a344db752f513437138953af191cbe9a691.zip | |
mac80211: skip unnecessary pskb_expand_head calls
If the skb is not cloned and we don't need any extra headroom, there
is no point in reallocating the skb head.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/tx.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 8d01d21dff1e..90ee23550033 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1546,8 +1546,10 @@ static int ieee80211_skb_resize(struct ieee80211_local *local, if (skb_header_cloned(skb)) I802_DEBUG_INC(local->tx_expand_skb_head_cloned); - else + else if (head_need || tail_need) I802_DEBUG_INC(local->tx_expand_skb_head); + else + return 0; if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { wiphy_debug(local->hw.wiphy, |