net: core: add of_find_net_device_by_node()

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / net / core / net-sysfs.c

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index f2aa73b..cf30620 100644 (file)
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -23,6 +23,7 @@
 #include <linux/export.h>
 #include <linux/jiffies.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
 
 #include "net-sysfs.h"
 
@@ -1374,6 +1375,30 @@ static struct class net_class = {
        .namespace = net_namespace,
 };
 
+#ifdef CONFIG_OF_NET
+static int of_dev_node_match(struct device *dev, const void *data)
+{
+       int ret = 0;
+
+       if (dev->parent)
+               ret = dev->parent->of_node == data;
+
+       return ret == 0 ? dev->of_node == data : ret;
+}
+
+struct net_device *of_find_net_device_by_node(struct device_node *np)
+{
+       struct device *dev;
+
+       dev = class_find_device(&net_class, NULL, np, of_dev_node_match);
+       if (!dev)
+               return NULL;
+
+       return to_net_dev(dev);
+}
+EXPORT_SYMBOL(of_find_net_device_by_node);
+#endif
+
 /* Delete sysfs entries but hold kobject reference until after all
  * netdev references are gone.
  */