1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index fa41ee90a53a..7e17488271a8 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -160,6 +160,30 @@ static ssize_t driver_unbind(struct device_driver *drv,
 }
 static DRIVER_ATTR(unbind, S_IWUSR, NULL, driver_unbind);
 
+/*
+ * Manually attach a device to a driver.
+ * Note: the driver must want to bind to the device,
+ * it is not possible to override the driver's id table.
+ */
+static ssize_t driver_bind(struct device_driver *drv,
+                           const char *buf, size_t count)
+{
+        struct bus_type *bus = get_bus(drv->bus);
+        struct device *dev;
+        int err = -ENODEV;
+
+        dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
+        if ((dev) &&
+            (dev->driver == NULL)) {
+                down(&dev->sem);
+                err = driver_probe_device(drv, dev);
+                up(&dev->sem);
+                put_device(dev);
+        }
+        return err;
+}
+static DRIVER_ATTR(bind, S_IWUSR, NULL, driver_bind);
+
 
 static struct device * next_device(struct klist_iter * i)
 {
@@ -425,6 +449,7 @@ int bus_add_driver(struct device_driver * drv)
 
                 driver_add_attrs(bus, drv);
                 driver_create_file(drv, &driver_attr_unbind);
+                driver_create_file(drv, &driver_attr_bind);
         }
         return error;
 }
@@ -442,6 +467,7 @@ int bus_add_driver(struct device_driver * drv)
 void bus_remove_driver(struct device_driver * drv)
 {
         if (drv->bus) {
+                driver_remove_file(drv, &driver_attr_bind);
                 driver_remove_file(drv, &driver_attr_unbind);
                 driver_remove_attrs(drv->bus, drv);
                 klist_remove(&drv->knode_bus);