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>
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@ -1546,8 +1546,10 @@ static int ieee80211_skb_resize(struct ieee80211_local *local,
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if (skb_header_cloned(skb))
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I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
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else
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else if (head_need || tail_need)
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I802_DEBUG_INC(local->tx_expand_skb_head);
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else
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return 0;
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if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
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wiphy_debug(local->hw.wiphy,
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