rt2x00: pause almost full queue early
Do not drop &queue->tx_lock and acquire it again to pause queue when
available entries are below the threshold.
Patch should mitigate problem of frequently printed errors:
"Error - Dropping frame due to full tx queue"
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Tested-by: Enrico Mioso@gmail.com
Tested-by: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
index 6598cef..a6884e7 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
@@ -715,6 +715,14 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
rt2x00queue_kick_tx_queue(queue, &txdesc);
out:
+ /*
+ * Pausing queue has to be serialized with rt2x00lib_txdone(), so we
+ * do this under queue->tx_lock. Bottom halve was already disabled
+ * before ieee80211_xmit() call.
+ */
+ if (rt2x00queue_threshold(queue))
+ rt2x00queue_pause_queue(queue);
+
spin_unlock(&queue->tx_lock);
return ret;
}