ath10k: merge some more pending upstream fixes

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2016-06-17 14:12:44 +02:00
parent c2e0c41842
commit 4bab4dee84
3 changed files with 128 additions and 2 deletions

View file

@ -0,0 +1,67 @@
From: Michal Kazior <michal.kazior@tieto.com>
Date: Mon, 23 May 2016 23:12:45 +0300
Subject: [PATCH] ath10k: improve tx scheduling
Recent changes revolving around implementing
wake_tx_queue support introduced a significant
performance regressions on some (slower, uni-proc)
systems.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
---
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -2291,7 +2291,6 @@ bool ath10k_htt_t2h_msg_handler(struct a
ath10k_htt_tx_mgmt_dec_pending(htt);
spin_unlock_bh(&htt->tx_lock);
}
- ath10k_mac_tx_push_pending(ar);
break;
}
case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
@@ -2442,8 +2441,6 @@ static void ath10k_htt_txrx_compl_task(u
dev_kfree_skb_any(skb);
}
- ath10k_mac_tx_push_pending(ar);
-
num_mpdus = atomic_read(&htt->num_mpdus_ready);
while (num_mpdus) {
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3827,6 +3827,9 @@ void ath10k_mac_tx_push_pending(struct a
int ret;
int max;
+ if (ar->htt.num_pending_tx >= (ar->htt.max_num_pending_tx / 2))
+ return;
+
spin_lock_bh(&ar->txqs_lock);
rcu_read_lock();
@@ -4097,9 +4100,7 @@ static void ath10k_mac_op_wake_tx_queue(
list_add_tail(&artxq->list, &ar->txqs);
spin_unlock_bh(&ar->txqs_lock);
- if (ath10k_mac_tx_can_push(hw, txq))
- tasklet_schedule(&ar->htt.txrx_compl_task);
-
+ ath10k_mac_tx_push_pending(ar);
ath10k_htt_tx_txq_update(hw, txq);
}
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -117,6 +117,9 @@ int ath10k_txrx_tx_unref(struct ath10k_h
ieee80211_tx_status(htt->ar->hw, msdu);
/* we do not own the msdu anymore */
+
+ ath10k_mac_tx_push_pending(ar);
+
return 0;
}

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@ -0,0 +1,59 @@
From: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Date: Thu, 9 Jun 2016 11:33:55 +0530
Subject: [PATCH] ath10k: fix deadlock while processing rx_in_ord_ind
commit 5c86d97bcc1d ("ath10k: combine txrx and replenish task")
introduced deadlock while processing rx in order indication message
for qca6174 based devices. While merging replenish and txrx tasklets,
replenish task should be called out of htt rx ring locking since it
is also try to acquire the same lock.
Unfortunately this issue is not exposed by other solutions (qca988x,
qca99x0 & qca4019), as rx_in_ord_ind message is specific to qca6174
based devices. This patch fixes
=============================================
[ INFO: possible recursive locking detected ]
4.7.0-rc2-wt-ath+ #1353 Tainted: G E
---------------------------------------------
swapper/3/0 is trying to acquire lock:
(&(&htt->rx_ring.lock)->rlock){+.-...}, at: [<f8d7ef19>]
ath10k_htt_rx_msdu_buff_replenish+0x29/0x90 [ath10k_core]
but task is already holding lock:
(&(&htt->rx_ring.lock)->rlock){+.-...}, at: [<f8d82cab>]
ath10k_htt_txrx_compl_task+0x21b/0x250 [ath10k_core]
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&htt->rx_ring.lock)->rlock);
lock(&(&htt->rx_ring.lock)->rlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
1 lock held by swapper/3/0:
#0: (&(&htt->rx_ring.lock)->rlock){+.-...}, at: [<f8d82cab>]
ath10k_htt_txrx_compl_task+0x21b/0x250 [ath10k_core]
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=119151
Fixes: 5c86d97bcc1d ("ath10k: combine txrx and replenish task")
Reported-by: Mike Lothian <mike@fireburn.co.uk>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
---
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1904,7 +1904,6 @@ static void ath10k_htt_rx_in_ord_ind(str
return;
}
}
- ath10k_htt_rx_msdu_buff_replenish(htt);
}
static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,

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@ -1,6 +1,6 @@
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -7716,6 +7716,21 @@ struct ath10k_vif *ath10k_get_arvif(stru
@@ -7717,6 +7717,21 @@ struct ath10k_vif *ath10k_get_arvif(stru
return arvif_iter.arvif;
}
@ -22,7 +22,7 @@
int ath10k_mac_register(struct ath10k *ar)
{
static const u32 cipher_suites[] = {
@@ -7940,6 +7955,12 @@ int ath10k_mac_register(struct ath10k *a
@@ -7941,6 +7956,12 @@ int ath10k_mac_register(struct ath10k *a
ar->hw->wiphy->cipher_suites = cipher_suites;
ar->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);