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

From: Greg KH
Date: Wed Dec 03 2008 - 14:50:25 EST

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)

/* Send RNDIS RESPONSE_AVAILABLE notification; a

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