From 042c53f6e84896701b67012ad525bc44ea6de25f Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Sun, 26 Sep 2010 21:48:31 +0200 Subject: [PATCH] carl9170: remove lost-frame workaround This patch removes some cruft, which survived the RFC review phase. Originally, carl9170_tx_ampdu_queue erroneously dropped a lot of frames. As a result the ampdu scheduler bogged down quite frequently and the affected BA session timed out. However this bug has been fixed and the WA and its debugfs counter is no longer useful. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/carl9170/carl9170.h | 1 - drivers/net/wireless/ath/carl9170/debug.c | 4 --- drivers/net/wireless/ath/carl9170/tx.c | 37 ++------------------ 3 files changed, 2 insertions(+), 40 deletions(-) diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h index d7c5482d74ce..20f2a77e54d2 100644 --- a/drivers/net/wireless/ath/carl9170/carl9170.h +++ b/drivers/net/wireless/ath/carl9170/carl9170.h @@ -364,7 +364,6 @@ struct ar9170 { unsigned int tx_dropped; unsigned int tx_ack_failures; unsigned int tx_fcs_errors; - unsigned int tx_ampdu_timeout; unsigned int rx_dropped; /* EEPROM */ diff --git a/drivers/net/wireless/ath/carl9170/debug.c b/drivers/net/wireless/ath/carl9170/debug.c index 19b48369ffed..0ac1124c2a0b 100644 --- a/drivers/net/wireless/ath/carl9170/debug.c +++ b/drivers/net/wireless/ath/carl9170/debug.c @@ -798,8 +798,6 @@ DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d", atomic_read(&ar->tx_total_queued)); DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d", atomic_read(&ar->tx_ampdu_scheduler)); -DEBUGFS_READONLY_FILE(tx_ampdu_timeout, 20, "%d", - ar->tx_ampdu_timeout); DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d", atomic_read(&ar->tx_total_pending)); @@ -872,8 +870,6 @@ void carl9170_debugfs_register(struct ar9170 *ar) DEBUGFS_ADD(ampdu_density); DEBUGFS_ADD(ampdu_factor); - DEBUGFS_ADD(tx_ampdu_timeout); - DEBUGFS_ADD(tx_janitor_last_run); DEBUGFS_ADD(tx_status_0); diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c index e0d2374e0c77..e6be5e6c1723 100644 --- a/drivers/net/wireless/ath/carl9170/tx.c +++ b/drivers/net/wireless/ath/carl9170/tx.c @@ -1042,41 +1042,8 @@ retry: queue = TID_TO_WME_AC(tid_info->tid); spin_lock_bh(&tid_info->lock); - if (tid_info->state != CARL9170_TID_STATE_XMIT) { - first = skb_peek(&tid_info->queue); - if (first) { - struct ieee80211_tx_info *txinfo; - struct carl9170_tx_info *arinfo; - - txinfo = IEEE80211_SKB_CB(first); - arinfo = (void *) txinfo->rate_driver_data; - - if (time_is_after_jiffies(arinfo->timeout + - msecs_to_jiffies(CARL9170_QUEUE_TIMEOUT)) - == true) - goto processed; - - /* - * We've been waiting for the frame which - * matches "snx" (start sequence of the - * next aggregate) for some time now. - * - * But it never arrived. Therefore - * jump to the next available frame - * and kick-start the transmission. - * - * Note: This might induce odd latency - * spikes because the receiver will be - * waiting for the lost frame too. - */ - ar->tx_ampdu_timeout++; - - tid_info->snx = carl9170_get_seq(first); - tid_info->state = CARL9170_TID_STATE_XMIT; - } else { - goto processed; - } - } + if (tid_info->state != CARL9170_TID_STATE_XMIT) + goto processed; tid_info->counter++; first = skb_peek(&tid_info->queue); -- 2.30.2