drivers: base: add notifier for failed driver bind

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 8a8d611..652c54c 100644 (file)
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -237,10 +237,14 @@ static int driver_sysfs_add(struct device *dev)
        return ret;
 }
 
-static void driver_sysfs_remove(struct device *dev)
+static void driver_sysfs_remove(struct device *dev, int failed)
 {
        struct device_driver *drv = dev->driver;
 
+       if (failed && dev->bus)
+               blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
+                                            BUS_NOTIFY_BIND_FAILED, dev);
+
        if (drv) {
                sysfs_remove_link(&drv->p->kobj, kobject_name(&dev->kobj));
                sysfs_remove_link(&dev->kobj, "driver");
@@ -316,7 +320,7 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 
 probe_failed:
        devres_release_all(dev);
-       driver_sysfs_remove(dev);
+       driver_sysfs_remove(dev, true);
        dev->driver = NULL;
        dev_set_drvdata(dev, NULL);
 
@@ -509,7 +513,7 @@ static void __device_release_driver(struct device *dev)
        if (drv) {
                pm_runtime_get_sync(dev);
 
-               driver_sysfs_remove(dev);
+               driver_sysfs_remove(dev, false);
 
                if (dev->bus)
                        blocking_notifier_call_chain(&dev->bus->p->bus_notifier,

diff --git a/include/linux/device.h b/include/linux/device.h
index c0a1261..1ce409f 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -161,7 +161,7 @@ extern int bus_register_notifier(struct bus_type *bus,
 extern int bus_unregister_notifier(struct bus_type *bus,
                                   struct notifier_block *nb);
 
-/* All 4 notifers below get called with the target struct device *
+/* All 7 notifers below get called with the target struct device *
  * as an argument. Note that those functions are likely to be called
  * with the device lock held in the core, so be careful.
  */
@@ -174,6 +174,8 @@ extern int bus_unregister_notifier(struct bus_type *bus,
                                                      unbound */
 #define BUS_NOTIFY_UNBOUND_DRIVER      0x00000006 /* driver is unbound
                                                      from the device */
+#define BUS_NOTIFY_BIND_FAILED         0x00000007 /* driver failed to bind
+                                                     to device */
 
 extern struct kset *bus_get_kset(struct bus_type *bus);
 extern struct klist *bus_get_device_klist(struct bus_type *bus);