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authorSathya Perla <sathyap@serverengines.com>2009-08-10 03:42:43 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-12 22:13:16 -0700
commita8e9179a7de196d37410fd3e9528081f22c70a4e (patch)
treeb7ad488a9493feab8babdb5c00165cc5fa57a76e /drivers/net/benet/be_main.c
parentf2341641766af3de18502abb6ac9b98e0e4c6bdb (diff)
be2net: Clear pending tx completions before destroying tx queue
Clear pending tx completions in be_close() (ndo.stop method) so that after unregister_netdev() calls be_close(), all tx skbs are freed and there are no more tx completions when txq is destroyed. Signed-off-by: Sathya Perla <sathyap@serverengines.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/benet/be_main.c')
-rw-r--r--drivers/net/benet/be_main.c52
1 files changed, 33 insertions, 19 deletions
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index d20235b1680..acce6a63932 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -1018,21 +1018,35 @@ static void be_rx_q_clean(struct be_adapter *adapter)
BUG_ON(atomic_read(&rxq->used));
}
-static void be_tx_q_clean(struct be_adapter *adapter)
+static void be_tx_compl_clean(struct be_adapter *adapter)
{
- struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list;
- struct sk_buff *sent_skb;
+ struct be_queue_info *tx_cq = &adapter->tx_obj.cq;
struct be_queue_info *txq = &adapter->tx_obj.q;
- u16 last_index;
- bool dummy_wrb;
-
- while (atomic_read(&txq->used)) {
- sent_skb = sent_skbs[txq->tail];
- last_index = txq->tail;
- index_adv(&last_index,
- wrb_cnt_for_skb(sent_skb, &dummy_wrb) - 1, txq->len);
- be_tx_compl_process(adapter, last_index);
- }
+ struct be_eth_tx_compl *txcp;
+ u16 end_idx, cmpl = 0, timeo = 0;
+
+ /* 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);
+ be_tx_compl_process(adapter, end_idx);
+ cmpl++;
+ }
+ if (cmpl) {
+ be_cq_notify(adapter, tx_cq->id, false, cmpl);
+ cmpl = 0;
+ }
+
+ if (atomic_read(&txq->used) == 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));
}
static void be_mcc_queues_destroy(struct be_adapter *adapter)
@@ -1091,13 +1105,8 @@ static void be_tx_queues_destroy(struct be_adapter *adapter)
struct be_queue_info *q;
q = &adapter->tx_obj.q;
- if (q->created) {
+ if (q->created)
be_cmd_q_destroy(adapter, q, QTYPE_TXQ);
-
- /* No more tx completions can be rcvd now; clean up if there
- * are any pending completions or pending tx requests */
- be_tx_q_clean(adapter);
- }
be_queue_free(adapter, q);
q = &adapter->tx_obj.cq;
@@ -1645,6 +1654,11 @@ static int be_close(struct net_device *netdev)
napi_disable(&rx_eq->napi);
napi_disable(&tx_eq->napi);
+ /* Wait for all pending tx completions to arrive so that
+ * all tx skbs are freed.
+ */
+ be_tx_compl_clean(adapter);
+
return 0;
}