This issue happens only when we are associated with a 11n AP and power save
is enabled. In the function 'ieee80211_master_start_xmit', ps_disable_work
is queued where wake_queues is called. But before this work is executed,
we check if the queues are stopped in _ieee80211_tx and return TX_AGAIN to
ieee8011_tx which leads to the warning message.
This patch fixes this erroneous case.
Signed-off-by: Vivek Natarajan <vnatarajan@xxxxxxxxxxx>
---
net/mac80211/tx.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index f1c726d..bf73f6d 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -35,6 +35,7 @@
#define IEEE80211_TX_OK 0
#define IEEE80211_TX_AGAIN 1
#define IEEE80211_TX_FRAG_AGAIN 2
+#define IEEE80211_TX_PENDING 3
/* misc utils */
@@ -1085,7 +1086,7 @@ static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
if (skb) {
if (netif_subqueue_stopped(local->mdev, skb))
- return IEEE80211_TX_AGAIN;
+ return IEEE80211_TX_PENDING;
ret = local->ops->tx(local_to_hw(local), skb);
if (ret)
@@ -1211,8 +1212,9 @@ retry:
* queues, there's no reason for a driver to reject
* a frame there, warn and drop it.
*/
- if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
- goto drop;
+ if (ret != IEEE80211_TX_PENDING)
+ if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
+ goto drop;
store = &local->pending_packet[queue];
--
1.6.0.1
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
