devres: fix devres_get()

commit 64526370 upstream.

Currently, devres_get() passes devres_free() the pointer to devres,
but devres_free() should be given with the pointer to resource data.

Fixes: 9ac7849e ("devres: device resource management")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
(cherry picked from commit ebc0ae5a)
Signed-off-by: Willy Tarreau <w@1wt.eu>

drivers/base/devres.c

@@ -253,10 +253,10 @@ void * devres_get(struct device *dev, void *new_res,
 	if (!dr) {
 		add_dr(dev, &new_dr->node);
 		dr = new_dr;
-		new_dr = NULL;
+		new_res = NULL;
 	}
 	spin_unlock_irqrestore(&dev->devres_lock, flags);
-	devres_free(new_dr);
+	devres_free(new_res);
 
 	return dr->data;
 }