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Date: Fri, 24 Feb 2012 10:20:14 +0530
From: Sathya Perla <sathya.perla@...lex.com>
To: <netdev@...r.kernel.org>
Subject: [net-next PATCH 2/5] be2net: fix tx completion cleanup
As a part of be_close(), instead of waiting for a max of 200ms for each TXQ,
wait for a total of 200ms for completions from all TXQs to arrive.
Signed-off-by: Sathya Perla <sathya.perla@...lex.com>
---
drivers/net/ethernet/emulex/benet/be_main.c | 73 +++++++++++++++------------
1 files changed, 41 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 68408d5..36ad9a7 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1563,51 +1563,62 @@ static void be_rx_cq_clean(struct be_rx_obj *rxo)
rxq->tail = rxq->head = 0;
}
-static void be_tx_compl_clean(struct be_adapter *adapter,
- struct be_tx_obj *txo)
+static void be_tx_compl_clean(struct be_adapter *adapter)
{
- struct be_queue_info *tx_cq = &txo->cq;
- struct be_queue_info *txq = &txo->q;
+ struct be_tx_obj *txo;
+ struct be_queue_info *txq;
struct be_eth_tx_compl *txcp;
u16 end_idx, cmpl = 0, timeo = 0, num_wrbs = 0;
- struct sk_buff **sent_skbs = txo->sent_skb_list;
struct sk_buff *sent_skb;
bool dummy_wrb;
+ int i, pending_txqs;
/* Wait for a max of 200ms for all the tx-completions to arrive. */
do {
- while ((txcp = be_tx_compl_get(tx_cq))) {
- end_idx = AMAP_GET_BITS(struct amap_eth_tx_compl,
- wrb_index, txcp);
- num_wrbs += be_tx_compl_process(adapter, txo, end_idx);
- cmpl++;
- }
- if (cmpl) {
- be_cq_notify(adapter, tx_cq->id, false, cmpl);
- atomic_sub(num_wrbs, &txq->used);
- cmpl = 0;
- num_wrbs = 0;
+ pending_txqs = adapter->num_tx_qs;
+
+ for_all_tx_queues(adapter, txo, i) {
+ txq = &txo->q;
+ while ((txcp = be_tx_compl_get(&txo->cq))) {
+ end_idx =
+ AMAP_GET_BITS(struct amap_eth_tx_compl,
+ wrb_index, txcp);
+ num_wrbs += be_tx_compl_process(adapter, txo,
+ end_idx);
+ cmpl++;
+ }
+ if (cmpl) {
+ be_cq_notify(adapter, txo->cq.id, false, cmpl);
+ atomic_sub(num_wrbs, &txq->used);
+ cmpl = 0;
+ num_wrbs = 0;
+ }
+ if (atomic_read(&txq->used) == 0)
+ pending_txqs--;
}
- if (atomic_read(&txq->used) == 0 || ++timeo > 200)
+ if (pending_txqs == 0 || ++timeo > 200)
break;
mdelay(1);
} while (true);
- if (atomic_read(&txq->used))
- dev_err(&adapter->pdev->dev, "%d pending tx-completions\n",
- atomic_read(&txq->used));
+ for_all_tx_queues(adapter, txo, i) {
+ txq = &txo->q;
+ if (atomic_read(&txq->used))
+ dev_err(&adapter->pdev->dev, "%d pending tx-compls\n",
+ atomic_read(&txq->used));
- /* free posted tx for which compls will never arrive */
- while (atomic_read(&txq->used)) {
- sent_skb = sent_skbs[txq->tail];
- end_idx = txq->tail;
- index_adv(&end_idx,
- wrb_cnt_for_skb(adapter, sent_skb, &dummy_wrb) - 1,
- txq->len);
- num_wrbs = be_tx_compl_process(adapter, txo, end_idx);
- atomic_sub(num_wrbs, &txq->used);
+ /* free posted tx for which compls will never arrive */
+ while (atomic_read(&txq->used)) {
+ sent_skb = txo->sent_skb_list[txq->tail];
+ end_idx = txq->tail;
+ num_wrbs = wrb_cnt_for_skb(adapter, sent_skb,
+ &dummy_wrb);
+ index_adv(&end_idx, num_wrbs - 1, txq->len);
+ num_wrbs = be_tx_compl_process(adapter, txo, end_idx);
+ atomic_sub(num_wrbs, &txq->used);
+ }
}
}
@@ -2236,7 +2247,6 @@ static void be_rx_qs_destroy(struct be_adapter *adapter)
static int be_close(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
- struct be_tx_obj *txo;
struct be_eq_obj *eqo;
int i;
@@ -2259,8 +2269,7 @@ static int be_close(struct net_device *netdev)
/* Wait for all pending tx completions to arrive so that
* all tx skbs are freed.
*/
- for_all_tx_queues(adapter, txo, i)
- be_tx_compl_clean(adapter, txo);
+ be_tx_compl_clean(adapter);
be_rx_qs_destroy(adapter);
return 0;
--
1.7.4
--
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