Gadget Zero patch for ZLP

While sending the string descriptor, Gadget Zero does not send a ZLP in
case the packet size is maxpacket size, resulting in a USBCV failure. 

The Ethernet Gadget has the following code which is missing from Gadget
Zero. Should this be added to the Gadget Zero also?

I have tested this change on OMAP2430 using MUSBHDRC HS USB controller.
Usbtest control and bulk tests continue to pass after this change.

Regards,
Vikram


Signed-off-by: Vikram Pandita <[email protected]>
---
diff -purN a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
--- a/drivers/usb/gadget/zero.c	2007-02-02 18:33:34.000000000 +0530
+++ b/drivers/usb/gadget/zero.c	2007-02-07 17:28:47.000000000 +0530
@@ -1072,7 +1072,8 @@ unknown:
 	/* respond with data transfer before status phase? */
 	if (value >= 0) {
 		req->length = value;
-		req->zero = value < w_length;
+		req->zero = value < w_length &&
+				(value % gadget->ep0->maxpacket) == 0;
 		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
 		if (value < 0) {
 			DBG (dev, "ep_queue --> %d\n", value);


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