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Commit 62082e56 authored by Richard Genoud's avatar Richard Genoud Committed by Artem Bityutskiy
Browse files

mtd: mtdparts: introduce mtd_get_device_size 



'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: default avatarRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
parent 5dee4674

drivers/mtd/mtdpart.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/mtd/partitions.h

+1 −0
Original line number Diff line number Diff line
@@ -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