usbutils - usb_nodev() allow a driver to drop a device

usbutils.c

@@ -1355,6 +1355,20 @@ static void release_cgpu(struct cgpu_info *cgpu)
 	cgminer_usb_unlock_bd(cgpu->drv, cgpu->usbinfo.bus_number, cgpu->usbinfo.device_address);
 }
 
+/*
+ * Force a NODEV on a device so it goes back to hotplug
+ */
+void usb_nodev(struct cgpu_info *cgpu)
+{
+	int pstate;
+
+	DEVWLOCK(cgpu, pstate);
+
+	release_cgpu(cgpu);
+
+	DEVWUNLOCK(cgpu, pstate);
+}
+
 /*
  * Use the same usbdev thus locking is across all related devices
  */

usbutils.h

@@ -358,7 +358,8 @@ bool async_usb_transfers(void);
 void cancel_usb_transfers(void);
 void usb_all(int level);
 const char *usb_cmdname(enum usb_cmds cmd);
-void usb_applog(struct cgpu_info *bflsc, enum usb_cmds cmd, char *msg, int amount, int err);
+void usb_applog(struct cgpu_info *cgpu, enum usb_cmds cmd, char *msg, int amount, int err);
+void usb_nodev(struct cgpu_info *cgpu);
 struct cgpu_info *usb_copy_cgpu(struct cgpu_info *orig);
 struct cgpu_info *usb_alloc_cgpu(struct device_drv *drv, int threads);
 struct cgpu_info *usb_free_cgpu(struct cgpu_info *cgpu);