linux-kernel - [PATCH 1/5] usb: gadget: f_mass_storage: Fix Bulk-only RESET handling

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Message-Id: <1302017802-16614-2-git-send-email-roger.quadros@nokia.com>
Date:	Tue,  5 Apr 2011 18:36:38 +0300
From:	Roger Quadros <roger.quadros@...ia.com>
To:	gregkh@...e.de
Cc:	mina86@...a86.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] usb: gadget: f_mass_storage: Fix Bulk-only RESET handling

The ep0 request tag was not recorded thus resulting in phase
problems while sending status/response in handle_execption() handler.
This was resulting in MSC compliance test failures with USBCV tool.

With this patch, the Bulk-Only Mass storage RESET request is
handled correctly and the MSC compliance tests pass.

Signed-off-by: Roger Quadros <roger.quadros@...ia.com>
---
 drivers/usb/gadget/f_mass_storage.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index ef6c65a..90472af 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -613,6 +613,11 @@ static int fsg_setup(struct usb_function *f,
 	if (!fsg_is_set(fsg->common))
 		return -EOPNOTSUPP;
 
+	++fsg->common->ep0_req_tag;	/* Record arrival of a new request */
+	req->context = NULL;
+	req->length = 0;
+	dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
+
 	switch (ctrl->bRequest) {
 
 	case USB_BULK_RESET_REQUEST:
-- 
1.6.0.4

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