MFNetBSD: usbdi.c (1.63), usbdi.h (1.41)

date: 2000/03/02 12:37:51;  author: augustss;
    Use ratecheck() to limit error messages on disconnect.
    Break out some common functionality.

We don't have ratecheck() in our kernel yet, so I've hardcoded
usb_ratecheck() to return true always.

sys/dev/usb/usbdi.c

@@ -1119,6 +1119,23 @@ usb_match_device(const struct usb_devno *tbl, u_int nentries, u_int sz,
 	return (NULL);
 }
 
+/*
+ * usbd_ratecheck() can limit the number of error messages that occurs.
+ * When a device is unplugged it may take up to 0.25s for the hub driver
+ * to notice it.  If the driver continuosly tries to do I/O operations
+ * this can generate a large number of messages.
+ */
+int
+usbd_ratecheck(struct timeval *last)
+{
+#if 0
+	static struct timeval errinterval = { 0, 2500000 }; /* 0.25 s*/
+
+	return (ratecheck(last, &errinterval));
+#endif
+	return (1);
+}
+
 #if defined(__FreeBSD__)
 int
 usbd_driver_load(module_t mod, int what, void *arg)

sys/dev/usb/usbdi.h

@@ -177,6 +177,8 @@ usb_endpoint_descriptor_t *usbd_get_endpoint_descriptor
 
 usbd_status usbd_reload_device_desc(usbd_device_handle);
 
+int usbd_ratecheck(struct timeval *last);
+
 /*
  * The usb_task structs form a queue of things to run in the USB event
  * thread.  Normally this is just device discovery when a connect/disconnect