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@nokia.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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 98d6b39061d2..e9de33d1c9a0 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -599,6 +599,11 @@ 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: