Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / drivers / base / bus.c

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index c314156..48718b7 100644 (file)
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -536,6 +536,28 @@ void bus_rescan_devices(struct bus_type * bus)
        bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper);
 }
 
+/**
+ * device_reprobe - remove driver for a device and probe for a new driver
+ * @dev: the device to reprobe
+ *
+ * This function detaches the attached driver (if any) for the given
+ * device and restarts the driver probing process.  It is intended
+ * to use if probing criteria changed during a devices lifetime and
+ * driver attachment should change accordingly.
+ */
+void device_reprobe(struct device *dev)
+{
+       if (dev->driver) {
+               if (dev->parent)        /* Needed for USB */
+                       down(&dev->parent->sem);
+               device_release_driver(dev);
+               if (dev->parent)
+                       up(&dev->parent->sem);
+       }
+
+       bus_rescan_devices_helper(dev, NULL);
+}
+EXPORT_SYMBOL_GPL(device_reprobe);
 
 struct bus_type * get_bus(struct bus_type * bus)
 {