[patch 001/104] USB: gadget rndis: send notifications

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Richard Röjfors <richard.rojfors@xxxxxxxxx>

commit ff3495052af48f7a2bf7961b131dc9e161dae19c upstream.

It turns out that atomic_inc_return() returns the *new* value
not the original one, so the logic in rndis_response_available()
kept the first RNDIS response notification from getting out.
This prevented interoperation with MS-Windows (but not Linux).

Fix this to make RNDIS behave again.

Signed-off-by: Richard Röjfors <richard.rojfors@xxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/usb/gadget/f_rndis.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -303,7 +303,7 @@ static void rndis_response_available(voi
 	__le32				*data = req->buf;
 	int				status;
 
-	if (atomic_inc_return(&rndis->notify_count))
+	if (atomic_inc_return(&rndis->notify_count) != 1)
 		return;
 
 	/* Send RNDIS RESPONSE_AVAILABLE notification; a

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