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mtd: Introduce mtd_block_isreserved()

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In addition to mtd_block_isbad(), which checks if a block is bad or
reserved, it's needed to check if a block is reserved only (but not
bad). This commit adds an MTD interface for it, in a similar fashion to
mtd_block_isbad().

While here, fix mtd_block_isbad() so the out-of-bounds checking is done
before the callback check.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Ezequiel Garcia
2014-05-21 19:06:12 -03:00
committed by Brian Norris
parent 990a3af0c2
commit 8471bb73ba
6 changed files with 57 additions and 3 deletions
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14
drivers/mtd/nand/nand_bbt.c
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@@ -1310,6 +1310,20 @@ int nand_default_bbt(struct mtd_info *mtd)
return nand_scan_bbt(mtd, this->badblock_pattern);
}
/**
* nand_isreserved_bbt - [NAND Interface] Check if a block is reserved
* @mtd: MTD device structure
* @offs: offset in the device
*/
int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)
{
struct nand_chip *this = mtd->priv;
int block;
block = (int)(offs >> this->bbt_erase_shift);
return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED;
}
/**
* nand_isbad_bbt - [NAND Interface] Check if a block is bad
* @mtd: MTD device structure