netdev - [PATCH net-next] usbnet: use netif_tx_wake_queue instead of netif_start

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Date:	Wed, 14 Mar 2012 15:00:24 +0100
From:	Alexey Orishko <alexey.orishko@...il.com>
To:	netdev@...r.kernel.org, davem@...emloft.net, oliver@...kum.org
Cc:	linux-usb@...r.kernel.org, gregkh@...e.de,
	Alexey Orishko <alexey.orishko@...ricsson.com>
Subject: [PATCH net-next] usbnet: use netif_tx_wake_queue instead of netif_start_queue

If host is going to autosuspend function with two interfaces and
if IP packet has arrived in-between of two usbnet_suspend() callbacks,
i.e usbnet_resume() is called in-between, tx data flow is stopped.
When autosuspend timer expires and device is put to autosuspend
again, tx queue is waked up and data can be sent again.
This behavior might be repeated several times in a row.

Tested on Intel/ARM.

Reviewed-by: Sjur Brændeland <sjur.brandeland@...ricsson.com>
Tested-by: Dmitry Tarnyagin <dmitry.tarnyagin@...ricsson.com>
Signed-off-by: Alexey Orishko <alexey.orishko@...ricsson.com>
---
 drivers/net/usb/usbnet.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 83dcc53..5394b4e 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1535,7 +1535,7 @@ int usbnet_resume (struct usb_interface *intf)
 
 		if (test_bit(EVENT_DEV_OPEN, &dev->flags)) {
 			if (!(dev->txq.qlen >= TX_QLEN(dev)))
-				netif_start_queue(dev->net);
+				netif_tx_wake_all_queues(dev->net);
 			tasklet_schedule (&dev->bh);
 		}
 	}
-- 
1.7.4.1

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