From 94d55d62bd757611f07a9122e5e07ce929b8d38d Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Fri, 21 Oct 2011 18:38:56 +0200 Subject: [PATCH] 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 Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/carl9170/tx.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c index d209469..59472e16 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. */ } } -- 2.7.4