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carl9170: fix AMPDU TX_CTL_REQ_TX_STATUS handling

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Previously the driver did not care if TX_CTL_REQ_TX_STATUS
was set on aggregated frames or not and it would silently
drop successfully sent frames if possible [much like:
"no news is good news!"].

But, TX_CTL_REQ_TX_STATUS was invented for a reason and
no tx status report should ever be dropped if it is set.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2011-10-21 18:38:56 +02:00 committed by John W. Linville
parent fd26981cf5
commit 94d55d62bd
1 changed files with 7 additions and 4 deletions
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11
drivers/net/wireless/ath/carl9170/tx.c
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@ -296,7 +296,8 @@ static void carl9170_tx_release(struct kref *ref)
super = (void *)skb->data;
txinfo->status.ampdu_len = super->s.rix;
txinfo->status.ampdu_ack_len = super->s.cnt;
} else if (txinfo->flags & IEEE80211_TX_STAT_ACK) {
} else if ((txinfo->flags & IEEE80211_TX_STAT_ACK) &&
!(txinfo->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)) {
/*
* drop redundant tx_status reports:
*
@ -308,15 +309,17 @@ static void carl9170_tx_release(struct kref *ref)
*
* 3. minstrel_ht is picky, it only accepts
* reports of frames with the TX_STATUS_AMPDU flag.
*
* 4. mac80211 is not particularly interested in
* feedback either [CTL_REQ_TX_STATUS not set]
*/
dev_kfree_skb_any(skb);
return;
} else {
/*
* Frame has failed, but we want to keep it in
* case it was lost due to a power-state
* transition.
* Either the frame transmission has failed or
* mac80211 requested tx status.
*/
}
}