From f5f7ba25de1bd591d109d2114620677f6af11d99 Mon Sep 17 00:00:00 2001 From: Kevin Fang Date: Fri, 27 Apr 2012 09:18:01 +0800 Subject: [PATCH] ath6kl: handle background(BK) stream properly on htc mbox layer When a STA sends huge BK QoS data frame first and then sends BE/VI/VO QoS data frame, the corresponding throughput becomes much lower than that without sends BK QoS data frame before. The root cause is that when station send BK stream, the tx credits of BK stream don't return back to higher priority QoS stream such as BE, VI, and VO stream. This patch will handle BK stream properly, when there is higher priority QoS stream, it will seek tx credits from BK stream properly. Signed-off-by: Kevin Fang Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/htc_mbox.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/htc_mbox.c b/drivers/net/wireless/ath/ath6kl/htc_mbox.c index 65310d5ae46a..89eccadd5386 100644 --- a/drivers/net/wireless/ath/ath6kl/htc_mbox.c +++ b/drivers/net/wireless/ath/ath6kl/htc_mbox.c @@ -83,10 +83,7 @@ static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, * never goes inactive EVER. */ cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; - } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC) - /* this is the lowest priority data endpoint */ - /* FIXME: this looks fishy, check */ - cred_info->lowestpri_ep_dist = cur_ep_dist->list; + } /* * Streams have to be created (explicit | implicit) for all @@ -100,6 +97,13 @@ static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, */ } + /* + * For ath6kl_credit_seek function, + * it use list_for_each_entry_reverse to walk around the whole ep list. + * Therefore assign this lowestpri_ep_dist after walk around the ep_list + */ + cred_info->lowestpri_ep_dist = cur_ep_dist->list; + WARN_ON(cred_info->cur_free_credits <= 0); list_for_each_entry(cur_ep_dist, ep_list, list) {