mtd: expose subpage size via sysfs (e7693548) · Commits · 戴 / test

MTD has got sysfs support in 2.6.30-rc1. But subpage size is not exposed there - do this. UBI utilities badly need this parameter. At the moment there is no way to get subpage size - ioctls do not return it. And we just got sysfs support, so we can easilly extend it with this additional parameter. This can be merged late in the development cycle because: 1. sysfs support has been just added - there are no users for it so far, even. 2. UBI utilities really need this parameter, and it is better not to delay this. Signed-off-by:

Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by:

David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/mtdcore.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -132,6 +132,17 @@ static ssize_t mtd_writesize_show(struct device *dev,
		}
		static DEVICE_ATTR(writesize, S_IRUGO, mtd_writesize_show, NULL);

		static ssize_t mtd_subpagesize_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		struct mtd_info *mtd = dev_to_mtd(dev);
		unsigned int subpagesize = mtd->writesize >> mtd->subpage_sft;

		return snprintf(buf, PAGE_SIZE, "%u\n", subpagesize);

		}
		static DEVICE_ATTR(subpagesize, S_IRUGO, mtd_subpagesize_show, NULL);

		static ssize_t mtd_oobsize_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		@@ -169,6 +180,7 @@ static struct attribute *mtd_attrs[] = {
		&dev_attr_size.attr,
		&dev_attr_erasesize.attr,
		&dev_attr_writesize.attr,
		&dev_attr_subpagesize.attr,
		&dev_attr_oobsize.attr,
		&dev_attr_numeraseregions.attr,
		&dev_attr_name.attr,

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