linux-kernel - [PATCH] USB: g_printer: fix handling zero-length packet

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Date:	Fri, 19 Sep 2008 21:00:37 -0400
From:	sangsu <sangsu@...il.com>
To:	stern@...land.harvard.edu
CC:	david-b@...bell.net, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] USB: g_printer: fix handling zero-length packet

g_printer doesn't have to check whether the data size is a multiple of
MaxPacketSize, because device controller driver already make that check.

Signed-off-by: SangSu Park<sangsu@...il.com>
---
drivers/usb/gadget/printer.c | 3++-
1 files changed, 2 insertion(+), 1 deletions(-)


--- a/drivers/usb/gadget/printer.c	2008-08-12 21:55:39.000000000 -0400
+++ b/drivers/usb/gadget/printer.c	2008-09-19 20:39:44.000000000 -0400
@@ -1264,8 +1264,7 @@
	/* respond with data transfer before status phase? */
	if (value >= 0) {
		req->length = value;
-		req->zero = value < wLength
-				&& (value % gadget->ep0->maxpacket) == 0;
+		req->zero = value < wLength;
		value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
		if (value < 0) {
			DBG(dev, "ep_queue --> %d\n", value);
--
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