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Subjectstaging: et131x: on transmit, stop the queue if the next packet will fail
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* Currently the tx queue is only stopped when the current packet fails.
Check if the next packet will fail, and stop the queue if so.

* Removed associated item from TODO list in the README.

* Also minor fixup as adapter was being declared as null and immediately set
to a value.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
---
drivers/staging/et131x/README | 1 -
drivers/staging/et131x/et131x.c | 13 ++++++-------
2 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/et131x/README b/drivers/staging/et131x/README
index 0928eb5..3458aa7 100644
--- a/drivers/staging/et131x/README
+++ b/drivers/staging/et131x/README
@@ -9,7 +9,6 @@ driver as they did not build properly at the time.

TODO:
- Use of kmem_cache seems a bit unusual
- - It's too late stopping the tx queue when there is no room for the current packet. The condition should be detected for the next packet.

Please send patches to:
Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index cc41111..993f93a 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -3448,9 +3448,7 @@ static int send_packet(struct sk_buff *skb, struct et131x_adapter *adapter)
int et131x_send_packets(struct sk_buff *skb, struct net_device *netdev)
{
int status = 0;
- struct et131x_adapter *adapter = NULL;
-
- adapter = netdev_priv(netdev);
+ struct et131x_adapter *adapter = netdev_priv(netdev);

/* Send these packets
*
@@ -5347,6 +5345,11 @@ static void et131x_multicast(struct net_device *netdev)
static int et131x_tx(struct sk_buff *skb, struct net_device *netdev)
{
int status = 0;
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ /* stop the queue if it's getting full */
+ if(adapter->tx_ring.used >= NUM_TCB - 1 && !netif_queue_stopped(netdev))
+ netif_stop_queue(netdev);

/* Save the timestamp for the TX timeout watchdog */
netdev->trans_start = jiffies;
@@ -5357,10 +5360,6 @@ static int et131x_tx(struct sk_buff *skb, struct net_device *netdev)
/* Check status and manage the netif queue if necessary */
if (status != 0) {
if (status == -ENOMEM) {
- /* Put the queue to sleep until resources are
- * available
- */
- netif_stop_queue(netdev);
status = NETDEV_TX_BUSY;
} else {
status = NETDEV_TX_OK;
--
1.7.6.4


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