Merge tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-block.git] / drivers / base / core.c

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 92119080474c8b83fb7d41d9840bbc6b1ac2a79c..da84a73f2ba63b6ecfa6d84483770ceb32db0e93 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2474,6 +2474,34 @@ struct device *device_find_child(struct device *parent, void *data,
 }
 EXPORT_SYMBOL_GPL(device_find_child);
 
+/**
+ * device_find_child_by_name - device iterator for locating a child device.
+ * @parent: parent struct device
+ * @name: name of the child device
+ *
+ * This is similar to the device_find_child() function above, but it
+ * returns a reference to a device that has the name @name.
+ *
+ * NOTE: you will need to drop the reference with put_device() after use.
+ */
+struct device *device_find_child_by_name(struct device *parent,
+                                        const char *name)
+{
+       struct klist_iter i;
+       struct device *child;
+
+       if (!parent)
+               return NULL;
+
+       klist_iter_init(&parent->p->klist_children, &i);
+       while ((child = next_device(&i)))
+               if (!strcmp(dev_name(child), name) && get_device(child))
+                       break;
+       klist_iter_exit(&i);
+       return child;
+}
+EXPORT_SYMBOL_GPL(device_find_child_by_name);
+
 int __init devices_init(void)
 {
        devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);