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

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

[Alexey Orishko]

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-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Tested-by: Dmitry Tarnyagin <dmitry.tarnyagin-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Signed-off-by: Alexey Orishko <alexey.orishko-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
---
 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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Re: [PATCH net-next] usbnet: use netif_tx_wake_queue instead of netif_start_queue

[Oliver Neukum]

Am Mittwoch, 14. März 2012, 15:00:24 schrieb Alexey Orishko:
> 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-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
> Tested-by: Dmitry Tarnyagin <dmitry.tarnyagin-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
> Signed-off-by: Alexey Orishko <alexey.orishko-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Acked-by: Oliver Neukum <oneukum-l3A5Bk7waGM@public.gmane.org>
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Re: [PATCH net-next] usbnet: use netif_tx_wake_queue instead of netif_start_queue

[David Miller]

From: Oliver Neukum <oneukum@suse.de>
Date: Thu, 15 Mar 2012 18:05:09 +0100

> Am Mittwoch, 14. März 2012, 15:00:24 schrieb Alexey Orishko:
>> 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@stericsson.com>
>> Tested-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
>> Signed-off-by: Alexey Orishko <alexey.orishko@stericsson.com>
> Acked-by: Oliver Neukum <oneukum@suse.de>

Applied, thanks.