USB: g_printer required set interface request

g_printer reqiured "set interface" request from host. Not all hosts send
this request.  This patch enable the interface when it get "set
configuration" request from host.

Signed-off-by: Jonas Andersson <jonas@microbit.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index c3f2bd42bd5a..271ef94668e7 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1189,6 +1189,8 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
                         else if (gadget->a_alt_hnp_support)
                                 DBG(dev, "HNP needs a different root port\n");
                         value = printer_set_config(dev, wValue);
+                        if (!value)
+                                value = set_interface(dev, PRINTER_INTERFACE);
                         break;
                 case USB_REQ_GET_CONFIGURATION:
                         if (ctrl->bRequestType != USB_DIR_IN)