driver core: convert to use class_find_device api

Convert to use class_find_device api in drivers/base/core.c

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 11 insertions, 21 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index b1727876182c..a0cfda553c9d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1144,25 +1144,11 @@ error:
 }
 EXPORT_SYMBOL_GPL(device_create);
 
-/**
- * find_device - finds a device that was created with device_create()
- * @class: pointer to the struct class that this device was registered with
- * @devt: the dev_t of the device that was previously registered
- */
-static struct device *find_device(struct class *class, dev_t devt)
+static int __match_devt(struct device *dev, void *data)
 {
-        struct device *dev = NULL;
-        struct device *dev_tmp;
+        dev_t *devt = data;
 
-        down(&class->sem);
-        list_for_each_entry(dev_tmp, &class->devices, node) {
-                if (dev_tmp->devt == devt) {
-                        dev = dev_tmp;
-                        break;
-                }
-        }
-        up(&class->sem);
-        return dev;
+        return dev->devt == *devt;
 }
 
 /**
@@ -1177,9 +1163,11 @@ void device_destroy(struct class *class, dev_t devt)
 {
         struct device *dev;
 
-        dev = find_device(class, devt);
-        if (dev)
+        dev = class_find_device(class, &devt, __match_devt);
+        if (dev) {
+                put_device(dev);
                 device_unregister(dev);
+        }
 }
 EXPORT_SYMBOL_GPL(device_destroy);
 
@@ -1203,9 +1191,11 @@ void destroy_suspended_device(struct class *class, dev_t devt)
 {
         struct device *dev;
 
-        dev = find_device(class, devt);
-        if (dev)
+        dev = class_find_device(class, &devt, __match_devt);
+        if (dev) {
                 device_pm_schedule_removal(dev);
+                put_device(dev);
+        }
 }
 EXPORT_SYMBOL_GPL(destroy_suspended_device);
 #endif /* CONFIG_PM_SLEEP */