linux-kernel - [PATCH 3.12 097/123] i2c: s3c2410: enable RuntimePM before registering to the core

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Message-Id: <500c65bc907d95878cab7fb435093cb5748b3e29.1446021555.git.jslaby@suse.cz>
Date:	Wed, 28 Oct 2015 14:53:28 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Wolfram Sang <wsa@...-dreams.de>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 097/123] i2c: s3c2410: enable RuntimePM before registering to the core

From: Wolfram Sang <wsa+renesas@...g-engineering.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit eadd709f5d2e8aebb1b7bf49460e97a68d81a9b0 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.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Acked-by: Kukjin Kim <kgene@...nel.org>
Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/i2c/busses/i2c-s3c2410.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index ce09bf932831..8983e7fa0fb4 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -1151,17 +1151,19 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
 	i2c->adap.nr = i2c->pdata->bus_num;
 	i2c->adap.dev.of_node = pdev->dev.of_node;
 
+	platform_set_drvdata(pdev, i2c);
+
+	pm_runtime_enable(&pdev->dev);
+
 	ret = i2c_add_numbered_adapter(&i2c->adap);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to add bus to i2c core\n");
+		pm_runtime_disable(&pdev->dev);
 		s3c24xx_i2c_deregister_cpufreq(i2c);
 		clk_unprepare(i2c->clk);
 		return ret;
 	}
 
-	platform_set_drvdata(pdev, i2c);
-
-	pm_runtime_enable(&pdev->dev);
 	pm_runtime_enable(&i2c->adap.dev);
 
 	dev_info(&pdev->dev, "%s: S3C I2C adapter\n", dev_name(&i2c->adap.dev));
-- 
2.6.2

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