From c4ac7b98bdeb04ffe867512f938a77d517cd9c6e Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Thu, 31 Jan 2013 21:42:00 +0000 Subject: [PATCH] staging/iio: (iio_hwmon) Use devm_kzalloc Signed-off-by: Guenter Roeck Signed-off-by: Jonathan Cameron --- drivers/staging/iio/iio_hwmon.c | 70 +++++++++++++---------------------------- 1 file changed, 22 insertions(+), 48 deletions(-) diff --git a/drivers/staging/iio/iio_hwmon.c b/drivers/staging/iio/iio_hwmon.c index 97ad645..fba8605 100644 --- a/drivers/staging/iio/iio_hwmon.c +++ b/drivers/staging/iio/iio_hwmon.c @@ -55,63 +55,47 @@ static ssize_t iio_hwmon_read_val(struct device *dev, return sprintf(buf, "%d\n", result); } -static void iio_hwmon_free_attrs(struct iio_hwmon_state *st) -{ - int i; - struct sensor_device_attribute *a; - for (i = 0; i < st->num_channels; i++) - if (st->attrs[i]) { - a = to_sensor_dev_attr( - container_of(st->attrs[i], - struct device_attribute, - attr)); - kfree(a); - } -} - static int iio_hwmon_probe(struct platform_device *pdev) { + struct device *dev = &pdev->dev; struct iio_hwmon_state *st; struct sensor_device_attribute *a; int ret, i; int in_i = 1, temp_i = 1, curr_i = 1; enum iio_chan_type type; - st = kzalloc(sizeof(*st), GFP_KERNEL); - if (st == NULL) { - ret = -ENOMEM; - goto error_ret; - } + st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL); + if (st == NULL) + return -ENOMEM; - st->channels = iio_channel_get_all(dev_name(&pdev->dev)); - if (IS_ERR(st->channels)) { - ret = PTR_ERR(st->channels); - goto error_free_state; - } + st->channels = iio_channel_get_all(dev_name(dev)); + if (IS_ERR(st->channels)) + return PTR_ERR(st->channels); /* count how many attributes we have */ while (st->channels[st->num_channels].indio_dev) st->num_channels++; - st->attrs = kzalloc(sizeof(*st->attrs) * (st->num_channels + 1), - GFP_KERNEL); + st->attrs = devm_kzalloc(dev, + sizeof(*st->attrs) * (st->num_channels + 1), + GFP_KERNEL); if (st->attrs == NULL) { ret = -ENOMEM; goto error_release_channels; } + for (i = 0; i < st->num_channels; i++) { - a = kzalloc(sizeof(*a), GFP_KERNEL); + a = devm_kzalloc(dev, sizeof(*a), GFP_KERNEL); if (a == NULL) { ret = -ENOMEM; - goto error_free_attrs; + goto error_release_channels; } sysfs_attr_init(&a->dev_attr.attr); ret = iio_get_channel_type(&st->channels[i], &type); - if (ret < 0) { - kfree(a); - goto error_free_attrs; - } + if (ret < 0) + goto error_release_channels; + switch (type) { case IIO_VOLTAGE: a->dev_attr.attr.name = kasprintf(GFP_KERNEL, @@ -130,13 +114,11 @@ static int iio_hwmon_probe(struct platform_device *pdev) break; default: ret = -EINVAL; - kfree(a); - goto error_free_attrs; + goto error_release_channels; } if (a->dev_attr.attr.name == NULL) { - kfree(a); ret = -ENOMEM; - goto error_free_attrs; + goto error_release_channels; } a->dev_attr.show = iio_hwmon_read_val; a->dev_attr.attr.mode = S_IRUGO; @@ -146,11 +128,11 @@ static int iio_hwmon_probe(struct platform_device *pdev) st->attr_group.attrs = st->attrs; platform_set_drvdata(pdev, st); - ret = sysfs_create_group(&pdev->dev.kobj, &st->attr_group); + ret = sysfs_create_group(&dev->kobj, &st->attr_group); if (ret < 0) - goto error_free_attrs; + goto error_release_channels; - st->hwmon_dev = hwmon_device_register(&pdev->dev); + st->hwmon_dev = hwmon_device_register(dev); if (IS_ERR(st->hwmon_dev)) { ret = PTR_ERR(st->hwmon_dev); goto error_remove_group; @@ -158,15 +140,9 @@ static int iio_hwmon_probe(struct platform_device *pdev) return 0; error_remove_group: - sysfs_remove_group(&pdev->dev.kobj, &st->attr_group); -error_free_attrs: - iio_hwmon_free_attrs(st); - kfree(st->attrs); + sysfs_remove_group(&dev->kobj, &st->attr_group); error_release_channels: iio_channel_release_all(st->channels); -error_free_state: - kfree(st); -error_ret: return ret; } @@ -176,8 +152,6 @@ static int iio_hwmon_remove(struct platform_device *pdev) hwmon_device_unregister(st->hwmon_dev); sysfs_remove_group(&pdev->dev.kobj, &st->attr_group); - iio_hwmon_free_attrs(st); - kfree(st->attrs); iio_channel_release_all(st->channels); return 0; -- 2.7.4