[PATCH 08/15] [media] marvell-ccic: switch to resource managed allocation and request

[<twang13@xxxxxxxxxxx>]

From: Libin Yang <lbyang@xxxxxxxxxxx>

This patch switchs to resource managed allocation and request in mmp-driver.
It can remove free resource operations.

Signed-off-by: Albert Wang <twang13@xxxxxxxxxxx>
Signed-off-by: Libin Yang <lbyang@xxxxxxxxxxx>
---
 drivers/media/platform/marvell-ccic/mmp-driver.c |   35 +++++++---------------
 1 file changed, 10 insertions(+), 25 deletions(-)

diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c
index 20046d0..c3031e7 100755
--- a/drivers/media/platform/marvell-ccic/mmp-driver.c
+++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
@@ -315,7 +315,7 @@ static int mmpcam_probe(struct platform_device *pdev)
 
 	pdata = pdev->dev.platform_data;
 
-	cam = kzalloc(sizeof(*cam), GFP_KERNEL);
+	cam = devm_kzalloc(&pdev->dev, sizeof(*cam), GFP_KERNEL);
 	if (cam == NULL)
 		return -ENOMEM;
 	cam->pdev = pdev;
@@ -342,14 +342,12 @@ static int mmpcam_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res == NULL) {
 		dev_err(&pdev->dev, "no iomem resource!\n");
-		ret = -ENODEV;
-		goto out_free;
+		return -ENODEV;
 	}
-	mcam->regs = ioremap(res->start, resource_size(res));
+	mcam->regs = devm_request_and_ioremap(&pdev->dev, res);
 	if (mcam->regs == NULL) {
 		dev_err(&pdev->dev, "MMIO ioremap fail\n");
-		ret = -ENODEV;
-		goto out_free;
+		return -ENODEV;
 	}
 	/*
 	 * Power/clock memory is elsewhere; get it too.  Perhaps this
@@ -358,14 +356,12 @@ static int mmpcam_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (res == NULL) {
 		dev_err(&pdev->dev, "no power resource!\n");
-		ret = -ENODEV;
-		goto out_unmap1;
+		return -ENODEV;
 	}
-	cam->power_regs = ioremap(res->start, resource_size(res));
+	cam->power_regs = devm_request_and_ioremap(&pdev->dev, res);
 	if (cam->power_regs == NULL) {
 		dev_err(&pdev->dev, "power MMIO ioremap fail\n");
-		ret = -ENODEV;
-		goto out_unmap1;
+		return -ENODEV;
 	}
 
 	mcam_init_clk(mcam, pdata, 1);
@@ -375,9 +371,8 @@ static int mmpcam_probe(struct platform_device *pdev)
 	 */
 	mcam->i2c_adapter = platform_get_drvdata(pdata->i2c_device);
 	if (mcam->i2c_adapter == NULL) {
-		ret = -ENODEV;
 		dev_err(&pdev->dev, "No i2c adapter\n");
-		goto out_unmap2;
+		return -ENODEV;
 	}
 	/*
 	 * Sensor GPIO pins.
@@ -386,7 +381,7 @@ static int mmpcam_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "Can't get sensor power gpio %d",
 				pdata->sensor_power_gpio);
-		goto out_unmap2;
+		return ret;
 	}
 	gpio_direction_output(pdata->sensor_power_gpio, 0);
 	ret = gpio_request(pdata->sensor_reset_gpio, "cam-reset");
@@ -414,7 +409,7 @@ static int mmpcam_probe(struct platform_device *pdev)
 		goto out_unregister;
 	}
 	cam->irq = res->start;
-	ret = request_irq(cam->irq, mmpcam_irq, IRQF_SHARED,
+	ret = devm_request_irq(&pdev->dev, cam->irq, mmpcam_irq, IRQF_SHARED,
 			"mmp-camera", mcam);
 	if (ret == 0) {
 		mmpcam_add_device(cam);
@@ -428,13 +423,7 @@ out_gpio2:
 	gpio_free(pdata->sensor_reset_gpio);
 out_gpio:
 	gpio_free(pdata->sensor_power_gpio);
-out_unmap2:
 	mcam_init_clk(mcam, pdata, 0);
-	iounmap(cam->power_regs);
-out_unmap1:
-	iounmap(mcam->regs);
-out_free:
-	kfree(cam);
 	return ret;
 }
 
@@ -445,16 +434,12 @@ static int mmpcam_remove(struct mmp_camera *cam)
 	struct mmp_camera_platform_data *pdata;
 
 	mmpcam_remove_device(cam);
-	free_irq(cam->irq, mcam);
 	mccic_shutdown(mcam);
 	mmpcam_power_down(mcam);
 	pdata = cam->pdev->dev.platform_data;
 	gpio_free(pdata->sensor_reset_gpio);
 	gpio_free(pdata->sensor_power_gpio);
-	iounmap(cam->power_regs);
-	iounmap(mcam->regs);
 	mcam_init_clk(mcam, pdata, 0);
-	kfree(cam);
 	return 0;
 }
 
-- 
1.7.9.5

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