of: fix race when matching drivers

[deliverable/linux.git] / include / linux / of_device.h

diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 8bfe6c1d43654069b8fa2e1bbc61ab4d34dd4d22..b33d68814a73c5e188142d94fae95572826d64e1 100644 (file)
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -21,8 +21,12 @@ extern void of_device_make_bus_id(struct device *dev);
 static inline int of_driver_match_device(struct device *dev,
                                         const struct device_driver *drv)
 {
-       dev->of_match = of_match_device(drv->of_match_table, dev);
-       return dev->of_match != NULL;
+       const struct of_device_id *match;
+
+       match = of_match_device(drv->of_match_table, dev);
+       if (match)
+               dev->of_match = match;
+       return match != NULL;
 }
 
 extern struct platform_device *of_dev_get(struct platform_device *dev);