summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/base/bus.c22
-rw-r--r--include/linux/device.h1
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index c3141565d59d..48718b7f4fa0 100644
--- 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)
{
diff --git a/include/linux/device.h b/include/linux/device.h
index 58df18d9cd3e..e8ac5bcfbec7 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -378,6 +378,7 @@ extern void device_bind_driver(struct device * dev);
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);
/*