[PATCH 3/5] pinctrl: handle zero found dt pinconfig properties better

From: "Heiko Stübner" <heiko@sntech.de>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Grant Likely <grant.likely@linaro.org>,
	rob.herring@calxeda.com, devicetree-discuss@lists.ozlabs.org,
	James Hogan <james.hogan@imgtec.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH 3/5] pinctrl: handle zero found dt pinconfig properties better
Date: Fri, 14 Jun 2013 17:43:21 +0200	[thread overview]
Message-ID: <201306141743.21365.heiko@sntech.de> (raw)
In-Reply-To: <201306141741.46077.heiko@sntech.de>

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>
---
 drivers/pinctrl/pinconf-generic.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index dcf0371..ea9da17 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -208,6 +208,13 @@ 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.
-- 
1.7.10.4

