[SCSI] drivers/base/bus.c - export 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index c314156..48718b7 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -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)
{
