mirror of https://gitee.com/openkylin/linux.git
UBI: add mtd_num sysfs attribute
Expose number or the underlying MTD device in sysfs. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -122,6 +122,8 @@ static struct device_attribute dev_min_io_size =
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__ATTR(min_io_size, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_bgt_enabled =
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__ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL);
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static struct device_attribute dev_mtd_num =
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__ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL);
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/**
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* ubi_get_device - get UBI device.
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@ -257,8 +259,10 @@ static ssize_t dev_attribute_show(struct device *dev,
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ret = sprintf(buf, "%d\n", ubi->min_io_size);
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else if (attr == &dev_bgt_enabled)
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ret = sprintf(buf, "%d\n", ubi->thread_enabled);
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else if (attr == &dev_mtd_num)
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ret = sprintf(buf, "%d\n", ubi->mtd->index);
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else
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BUG();
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ret = -EINVAL;
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ubi_put_device(ubi);
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return ret;
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@ -314,6 +318,9 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
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if (err)
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return err;
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err = device_create_file(&ubi->dev, &dev_bgt_enabled);
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if (err)
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return err;
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err = device_create_file(&ubi->dev, &dev_mtd_num);
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return err;
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}
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@ -323,6 +330,7 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
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*/
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static void ubi_sysfs_close(struct ubi_device *ubi)
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{
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device_remove_file(&ubi->dev, &dev_mtd_num);
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device_remove_file(&ubi->dev, &dev_bgt_enabled);
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device_remove_file(&ubi->dev, &dev_min_io_size);
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device_remove_file(&ubi->dev, &dev_max_vol_count);
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