[PATCH ] drivers/base/bus.c - export reprobe

["Moore, Eric" <Eric.Moore@lsil.com>]

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Request for exporting device_reprobe - 

Adding support for exposing hidden raid components 
for sg interface. The sdev->no_uld_attach flag
will set set accordingly.

The sas module supports adding/removing raid
volumes using online storage management application
interface.  

This patch was provided to me by Christoph Hellwig.

Signed-off-by: Eric Moore <Eric.Moore@lsil.com>

[-- Attachment #2: rescan_device --]
[-- Type: application/octet-stream, Size: 1641 bytes --]

Index: scsi-misc-2.6/drivers/base/bus.c
===================================================================
--- scsi-misc-2.6.orig/drivers/base/bus.c	2006-03-04 13:07:40.000000000 +0100
+++ scsi-misc-2.6/drivers/base/bus.c	2006-03-07 21:06:59.000000000 +0100
@@ -536,6 +536,28 @@
 	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)
 {
Index: scsi-misc-2.6/include/linux/device.h
===================================================================
--- scsi-misc-2.6.orig/include/linux/device.h	2006-03-04 13:07:49.000000000 +0100
+++ scsi-misc-2.6/include/linux/device.h	2006-03-07 20:53:43.000000000 +0100
@@ -378,6 +378,7 @@
 extern void device_release_driver(struct device * dev);
 extern int  device_attach(struct device * dev);
 extern void driver_attach(struct device_driver * drv);
+extern void device_reprobe(struct device *dev);
 
 
 /*