usb: chipidea: otg: set host_request_flag for gadget

Set host_request_flag if the current peripheral wants to take host role
via changing a_bus_req or b_bus_req by user application.

Acked-by: Peter Chen <[e-mail]>
Signed-off-by: Li Jun <[e-mail]>
Signed-off-by: Felipe Balbi <[e-mail]>

drivers/usb/chipidea/otg_fsm.c

···
 			return count;
 		}
 		ci->fsm.a_bus_req = 1;
+		if (ci->fsm.otg->state == OTG_STATE_A_PERIPHERAL) {
+			ci->gadget.host_request_flag = 1;
+			mutex_unlock(&ci->fsm.lock);
+			return count;
+		}
 	}
 
 	ci_otg_queue_work(ci);
···
 	mutex_lock(&ci->fsm.lock);
 	if (buf[0] == '0')
 		ci->fsm.b_bus_req = 0;
-	else if (buf[0] == '1')
+	else if (buf[0] == '1') {
 		ci->fsm.b_bus_req = 1;
+		if (ci->fsm.otg->state == OTG_STATE_B_PERIPHERAL) {
+			ci->gadget.host_request_flag = 1;
+			mutex_unlock(&ci->fsm.lock);
+			return count;
+		}
+	}
 
 	ci_otg_queue_work(ci);
 	mutex_unlock(&ci->fsm.lock);