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authorChristian Lamparter <chunkeey@googlemail.com>2011-10-21 18:38:56 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-11-02 15:23:12 -0400
commit94d55d62bd757611f07a9122e5e07ce929b8d38d (patch)
treedd6977b6c79f57d8601d633aa2466315d83a572e /drivers/net
parentfd26981cf53ee91951a92fae53416e4ce639164c (diff)
downloadblackbird-op-linux-94d55d62bd757611f07a9122e5e07ce929b8d38d.tar.gz
blackbird-op-linux-94d55d62bd757611f07a9122e5e07ce929b8d38d.zip
carl9170: fix AMPDU TX_CTL_REQ_TX_STATUS handling
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/ath/carl9170/tx.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c
index d20946939cd8..59472e1605cd 100644
--- a/drivers/net/wireless/ath/carl9170/tx.c
+++ b/drivers/net/wireless/ath/carl9170/tx.c
@@ -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.
*/
}
}
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