linux-kernel - [PATCH] i2c/imx: call ioremap only after request_mem

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Date:	Fri,  8 Jan 2010 17:23:17 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	Ben Dooks <ben-linux@...ff.org>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Richard Zhao <linuxzsc@...il.com>,
	Darius Augulis <augulis.darius@...il.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-i2c@...r.kernel.org
Subject: [PATCH] i2c/imx: call ioremap only after request_mem_region

accordingly adapt order of release_mem_region and release_mem_region on
remove.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: Ben Dooks <ben-linux@...ff.org>
Cc: Wolfram Sang <w.sang@...gutronix.de>
Cc: Richard Zhao <linuxzsc@...il.com>
Cc: Darius Augulis <augulis.darius@...il.com>
Cc: Sascha Hauer <s.hauer@...gutronix.de>
Cc: linux-i2c@...r.kernel.org
---
 drivers/i2c/busses/i2c-imx.c |   21 +++++++++++----------
 1 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index e3654d6..8431500 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -496,22 +496,23 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
 	}
 
 	res_size = resource_size(res);
+
+	if (!request_mem_region(res->start, res_size, DRIVER_NAME)) {
+		ret = -EBUSY;
+		goto fail0;
+	}
+
 	base = ioremap(res->start, res_size);
 	if (!base) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = -EIO;
-		goto fail0;
+		goto fail1;
 	}
 
 	i2c_imx = kzalloc(sizeof(struct imx_i2c_struct), GFP_KERNEL);
 	if (!i2c_imx) {
 		dev_err(&pdev->dev, "can't allocate interface\n");
 		ret = -ENOMEM;
-		goto fail1;
-	}
-
-	if (!request_mem_region(res->start, res_size, DRIVER_NAME)) {
-		ret = -EBUSY;
 		goto fail2;
 	}
 
@@ -582,11 +583,11 @@ fail5:
 fail4:
 	clk_put(i2c_imx->clk);
 fail3:
-	release_mem_region(i2c_imx->res->start, resource_size(res));
-fail2:
 	kfree(i2c_imx);
-fail1:
+fail2:
 	iounmap(base);
+fail1:
+	release_mem_region(res->start, resource_size(res));
 fail0:
 	if (pdata && pdata->exit)
 		pdata->exit(&pdev->dev);
@@ -618,8 +619,8 @@ static int __exit i2c_imx_remove(struct platform_device *pdev)
 
 	clk_put(i2c_imx->clk);
 
-	release_mem_region(i2c_imx->res->start, resource_size(i2c_imx->res));
 	iounmap(i2c_imx->base);
+	release_mem_region(i2c_imx->res->start, resource_size(i2c_imx->res));
 	kfree(i2c_imx);
 	return 0;
 }
-- 
1.6.5.2

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