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mtd: mtdparts: introduce mtd_get_device_size

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'mtd_get_device_size()' returns the size of the whole MTD device, that is the
mtd_info master size. This will be used by UBI to calculate the maximum number
of bad blocks (MBB) on a MTD device.

Artem: amended the patch a bit.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Richard Genoud 2012-07-10 18:23:40 +02:00 committed by Artem Bityutskiy
parent 5dee4674c8
commit 62082e56cb
2 changed files with 11 additions and 0 deletions
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10
drivers/mtd/mtdpart.c
View file

@ -760,3 +760,13 @@ int mtd_is_partition(const struct mtd_info *mtd)
return ispart;
}
EXPORT_SYMBOL_GPL(mtd_is_partition);
/* Returns the size of the entire flash chip */
uint64_t mtd_get_device_size(const struct mtd_info *mtd)
{
if (!mtd_is_partition(mtd))
return mtd->size;
return PART(mtd)->master->size;
}
EXPORT_SYMBOL_GPL(mtd_get_device_size);

1
include/linux/mtd/partitions.h
View file

@ -83,5 +83,6 @@ int mtd_is_partition(const struct mtd_info *mtd);
int mtd_add_partition(struct mtd_info *master, char *name,
long long offset, long long length);
int mtd_del_partition(struct mtd_info *master, int partno);
uint64_t mtd_get_device_size(const struct mtd_info *mtd);
#endif