mac80211: fix the skb cloned check in the tx path
Using skb_header_cloned to check if it's safe to write to the skb is not
enough - mac80211 also touches the tailroom of the skb.
Initially this check was only used to increase a counter, however this
commit changed the code to also skip skb data reallocation if no extra
head/tailroom was needed:
commit 4cd06a344d
mac80211: skip unnecessary pskb_expand_head calls
It added a regression at least with iwl3945, which is fixed by this patch.
Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
parent
3dd823e6b8
commit
fc7c976dc7
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@ -1547,7 +1547,7 @@ static int ieee80211_skb_resize(struct ieee80211_local *local,
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skb_orphan(skb);
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}
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if (skb_header_cloned(skb))
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if (skb_cloned(skb))
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I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
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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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