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mac80211: check skb_linearize() return value

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The A-MSDU TX code (within TXQs) didn't always check the return value
of skb_linearize() properly, resulting in potentially passing a frag-
list SKB down to the driver even when it said it can't handle it. Fix
that.

Fixes: 6e0456b545 ("mac80211: add A-MSDU tx support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2016-09-14 09:41:34 +02:00
parent ad5987b47e
commit 0b97a484e5
1 changed files with 6 additions and 2 deletions
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8
net/mac80211/tx.c
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@ -1515,8 +1515,12 @@ struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
spin_unlock_bh(&fq->lock);
if (skb && skb_has_frag_list(skb) &&
!ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
skb_linearize(skb);
!ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
if (skb_linearize(skb)) {
ieee80211_free_txskb(&local->hw, skb);
return NULL;
}
}
return skb;
}