linux-kernel - [PATCH 2/4] regulator: wm831x-dcdc: Convert to devm_request_threaded

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Message-Id: <1377947000-5746-2-git-send-email-broonie@kernel.org>
Date:	Sat, 31 Aug 2013 12:03:18 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Liam Girdwood <lgirdwood@...il.com>
Cc:	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org,
	linaro-kernel@...ts.linaro.org, Mark Brown <broonie@...aro.org>
Subject: [PATCH 2/4] regulator: wm831x-dcdc: Convert to devm_request_threaded_irq()

From: Mark Brown <broonie@...aro.org>

devm guarantees that resources are freed in the opposite order to that
in which they are registered.

Signed-off-by: Mark Brown <broonie@...aro.org>
---
 drivers/regulator/wm831x-dcdc.c | 36 ++++++++++++++----------------------
 1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 8f62750..aca2fcb 100644
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -532,8 +532,9 @@ static int wm831x_buckv_probe(struct platform_device *pdev)
 	}
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
-	ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
-				   IRQF_TRIGGER_RISING, dcdc->name, dcdc);
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					wm831x_dcdc_uv_irq,
+					IRQF_TRIGGER_RISING, dcdc->name, dcdc);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
 			irq, ret);
@@ -541,21 +542,19 @@ static int wm831x_buckv_probe(struct platform_device *pdev)
 	}
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC"));
-	ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq,
-				   IRQF_TRIGGER_RISING, dcdc->name, dcdc);
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					wm831x_dcdc_oc_irq,
+					IRQF_TRIGGER_RISING, dcdc->name, dcdc);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
 			irq, ret);
-		goto err_uv;
+		goto err_regulator;
 	}
 
 	platform_set_drvdata(pdev, dcdc);
 
 	return 0;
 
-err_uv:
-	free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
-		 dcdc);
 err_regulator:
 	regulator_unregister(dcdc->regulator);
 err:
@@ -565,12 +564,7 @@ err:
 static int wm831x_buckv_remove(struct platform_device *pdev)
 {
 	struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
-	struct wm831x *wm831x = dcdc->wm831x;
 
-	free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")),
-			    dcdc);
-	free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")),
-			    dcdc);
 	regulator_unregister(dcdc->regulator);
 
 	return 0;
@@ -688,8 +682,9 @@ static int wm831x_buckp_probe(struct platform_device *pdev)
 	}
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
-	ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
-				   IRQF_TRIGGER_RISING,	dcdc->name, dcdc);
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					wm831x_dcdc_uv_irq,
+					IRQF_TRIGGER_RISING, dcdc->name, dcdc);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
 			irq, ret);
@@ -710,8 +705,6 @@ static int wm831x_buckp_remove(struct platform_device *pdev)
 {
 	struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
 
-	free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
-			    dcdc);
 	regulator_unregister(dcdc->regulator);
 
 	return 0;
@@ -820,9 +813,10 @@ static int wm831x_boostp_probe(struct platform_device *pdev)
 	}
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
-	ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
-				   IRQF_TRIGGER_RISING, dcdc->name,
-				   dcdc);
+	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+					wm831x_dcdc_uv_irq,
+					IRQF_TRIGGER_RISING, dcdc->name,
+					dcdc);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
 			irq, ret);
@@ -843,8 +837,6 @@ static int wm831x_boostp_remove(struct platform_device *pdev)
 {
 	struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
 
-	free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")),
-		 dcdc);
 	regulator_unregister(dcdc->regulator);
 
 	return 0;
-- 
1.8.4.rc3

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