From: Heiko Stübner <heiko@sntech.de>
Date: Fri, 14 Jun 2013 15:43:21 +0000 (+0200)
Subject: pinctrl: handle zero found dt pinconfig properties better
X-Git-Tag: firefly_0821_release~6476
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e978099cb6156018068101a60b3c6478b341ee20;p=firefly-linux-kernel-4.4.55.git

pinctrl: handle zero found dt pinconfig properties better

This adds a shortcut when no valid pinconf properties are found
in the parsed dt node, to set the values immediately and return.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 807ffb4c361e..f6e6ea1b7643 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -204,6 +204,13 @@ int pinconf_generic_parse_dt_config(struct device_node *np,
 		ncfg++;
 	}
 
+	/* no configs found at all */
+	if (ncfg == 0) {
+		*configs = NULL;
+		*nconfigs = 0;
+		return 0;
+	}
+
 	/*
 	 * Now limit the number of configs to the real number of
 	 * found properties.