Commit 4cd06a34 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

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: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 489ee919

net/mac80211/tx.c

+3 −1
Original line number Diff line number Diff line
@@ -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,