From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Fri, 9 Oct 2015 09:39:25 +0000 (+0100)
Subject: i2c: rcar: enable RuntimePM before registering to the core
X-Git-Tag: firefly_0821_release~3679^2~4
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=49d851cea0996812449cbe2ceb886cbbf413085a;p=firefly-linux-kernel-4.4.55.git

i2c: rcar: enable RuntimePM before registering to the core

commit 4f7effddf4549d57114289f273710f077c4c330a upstream.

The core may register clients attached to this master which may use
funtionality from the master. So, RuntimePM must be enabled before, otherwise
this will fail. While here, move drvdata, too.

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 8a806f5c40cf..3f2dbd1ce6a3 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -673,15 +673,16 @@ static int rcar_i2c_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	pm_runtime_enable(dev);
+	platform_set_drvdata(pdev, priv);
+
 	ret = i2c_add_numbered_adapter(adap);
 	if (ret < 0) {
 		dev_err(dev, "reg adap failed: %d\n", ret);
+		pm_runtime_disable(dev);
 		return ret;
 	}
 
-	pm_runtime_enable(dev);
-	platform_set_drvdata(pdev, priv);
-
 	dev_info(dev, "probed\n");
 
 	return 0;