linux-kernel - [PATCH] drivers/thermal/spear_thermal.c: use devm_clk

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Date:	Fri,  7 Dec 2012 11:29:32 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	kernel-janitors@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drivers/thermal/spear_thermal.c: use devm_clk_get

From: Julia Lawall <Julia.Lawall@...6.fr>

devm_clk_get allocates a resource that is released when a driver detaches.
This patch uses devm_clk_get for data that is allocated in the probe
function of a platform device and is only released in the remove function.

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
I was not able to compile this code.  At one point, devm_clk_get was not
supported for all architectures.  If that is still the case, and the code
doesn't compile, then just ignore the patch.

 drivers/thermal/spear_thermal.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/thermal/spear_thermal.c b/drivers/thermal/spear_thermal.c
index 6b2d8b2..3c5ee56 100644
--- a/drivers/thermal/spear_thermal.c
+++ b/drivers/thermal/spear_thermal.c
@@ -131,7 +131,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	stdev->clk = clk_get(&pdev->dev, NULL);
+	stdev->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(stdev->clk)) {
 		dev_err(&pdev->dev, "Can't get clock\n");
 		return PTR_ERR(stdev->clk);
@@ -140,7 +140,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
 	ret = clk_enable(stdev->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "Can't enable clock\n");
-		goto put_clk;
+		return ret;
 	}
 
 	stdev->flags = val;
@@ -163,8 +163,6 @@ static int spear_thermal_probe(struct platform_device *pdev)
 
 disable_clk:
 	clk_disable(stdev->clk);
-put_clk:
-	clk_put(stdev->clk);
 
 	return ret;
 }
@@ -183,7 +181,6 @@ static int spear_thermal_exit(struct platform_device *pdev)
 	writel_relaxed(actual_mask & ~stdev->flags, stdev->thermal_base);
 
 	clk_disable(stdev->clk);
-	clk_put(stdev->clk);
 
 	return 0;
 }

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