From: Shawn Lin <shawn.lin@rock-chips.com>
Date: Mon, 15 Feb 2016 03:33:57 +0000 (+0800)
Subject: soc: rockchip: power-domain: check the existing of regmap
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4506697d9f8537a8d33e9e002f8efceb32d10757;p=linux-beck.git

soc: rockchip: power-domain: check the existing of regmap

Check return value of syscon_node_to_regmap for
rockchip_pm_domain_probe. If err value is returned, probe
procedure should abort.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 2116131528f7..ac729fe42cc9 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -475,6 +475,10 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
 	}
 
 	pmu->regmap = syscon_node_to_regmap(parent->of_node);
+	if (IS_ERR(pmu->regmap)) {
+		dev_err(dev, "no regmap available\n");
+		return PTR_ERR(pmu->regmap);
+	}
 
 	/*
 	 * Configure power up and down transition delays for CORE