[PATCH v4 5/8] usb: gadget: composite: handle otg status selector request from OTG host

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If gadget with HNP polling support receives GetStatus request of otg status
selector, it feedback to host with host request flag to indicate if it wants
to take host role.

Acked-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
---
 drivers/usb/gadget/composite.c |   25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 13adfd1..1f73bd9 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1594,15 +1594,24 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 		*((u8 *)req->buf) = value;
 		value = min(w_length, (u16) 1);
 		break;
-
-	/*
-	 * USB 3.0 additions:
-	 * Function driver should handle get_status request. If such cb
-	 * wasn't supplied we respond with default value = 0
-	 * Note: function driver should supply such cb only for the first
-	 * interface of the function
-	 */
 	case USB_REQ_GET_STATUS:
+		if (gadget_is_otg(gadget) && gadget->hnp_polling_support &&
+						(w_index == OTG_STS_SELECTOR)) {
+			if (ctrl->bRequestType != (USB_DIR_IN |
+							USB_RECIP_DEVICE))
+				goto unknown;
+			*((u8 *)req->buf) = gadget->host_request_flag;
+			value = 1;
+			break;
+		}
+
+		/*
+		 * USB 3.0 additions:
+		 * Function driver should handle get_status request. If such cb
+		 * wasn't supplied we respond with default value = 0
+		 * Note: function driver should supply such cb only for the
+		 * first interface of the function
+		 */
 		if (!gadget_is_superspeed(gadget))
 			goto unknown;
 		if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
-- 
1.7.9.5

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