[PATCH 7/8] mtd: plat_nand: Use devm_*() functions

Jingoo Han
2013-12-20T05:04:56Z

Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
---
drivers/mtd/nand/plat_nand.c | 30 +++++-------------------------
1 file changed, 5 insertions(+), 25 deletions(-)

diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index cad4cdc..7734f0e 100644
--- a/drivers/mtd/nand/plat_nand.c
+++ b/drivers/mtd/nand/plat_nand.c
@@ -52,25 +52,16 @@ static int plat_nand_probe(struct platform_device *pdev)
return -ENXIO;

/* Allocate memory for the device structure (and zero it) */
- data = kzalloc(sizeof(struct plat_nand_data), GFP_KERNEL);
+ data = devm_kzalloc(&pdev->dev, sizeof(struct plat_nand_data),
+ GFP_KERNEL);
if (!data) {
dev_err(&pdev->dev, "failed to allocate device structure.\n");
return -ENOMEM;
}

- if (!request_mem_region(res->start, resource_size(res),
- dev_name(&pdev->dev))) {
- dev_err(&pdev->dev, "request_mem_region failed\n");
- err = -EBUSY;
- goto out_free;
- }
-
- data->io_base = ioremap(res->start, resource_size(res));
- if (data->io_base == NULL) {
- dev_err(&pdev->dev, "ioremap failed\n");
- err = -EIO;
- goto out_release_io;
- }
+ data->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data->io_base))
+ return PTR_ERR(data->io_base);

data->chip.priv = &data;
data->mtd.priv = &data->chip;
@@ -122,11 +113,6 @@ static int plat_nand_probe(struct platform_device *pdev)
out:
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
- iounmap(data->io_base);
-out_release_io:
- release_mem_region(res->start, resource_size(res));
-out_free:
- kfree(data);
return err;
}

@@ -137,16 +123,10 @@ static int plat_nand_remove(struct platform_device *pdev)
{
struct plat_nand_data *data = platform_get_drvdata(pdev);
struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
- struct resource *res;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

nand_release(&data->mtd);
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
- iounmap(data->io_base);
- release_mem_region(res->start, resource_size(res));
- kfree(data);

return 0;
}
--
1.7.10.4