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authorEzequiel Garcia <ezequiel.garcia@free-electrons.com>2014-05-21 19:06:12 -0300
committerBrian Norris <computersforpeace@gmail.com>2014-07-08 18:38:16 -0700
commit8471bb73ba10ed6788b4f1e9b8a0f9dc6bdb05b5 (patch)
tree12fdaa370ab34c38c4057ddca0a2bcd52b5744a8 /drivers/mtd/nand
parent990a3af0c20590954be01a95c2c3fcef9360a836 (diff)
mtd: Introduce mtd_block_isreserved()
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>
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/nand_base.c18
-rw-r--r--drivers/mtd/nand/nand_bbt.c14
2 files changed, 32 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 41167e9e991e..0c505dd1f522 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -488,6 +488,23 @@ static int nand_check_wp(struct mtd_info *mtd)
* nand_block_checkbad - [GENERIC] Check if a block is marked bad
* @mtd: MTD device structure
* @ofs: offset from device start
+ *
+ * Check if the block is mark as reserved.
+ */
+static int nand_block_isreserved(struct mtd_info *mtd, loff_t ofs)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ if (!chip->bbt)
+ return 0;
+ /* Return info from the table */
+ return nand_isreserved_bbt(mtd, ofs);
+}
+
+/**
+ * nand_block_checkbad - [GENERIC] Check if a block is marked bad
+ * @mtd: MTD device structure
+ * @ofs: offset from device start
* @getchip: 0, if the chip is already selected
* @allowbbt: 1, if its allowed to access the bbt area
*
@@ -4111,6 +4128,7 @@ int nand_scan_tail(struct mtd_info *mtd)
mtd->_unlock = NULL;
mtd->_suspend = nand_suspend;
mtd->_resume = nand_resume;
+ mtd->_block_isreserved = nand_block_isreserved;
mtd->_block_isbad = nand_block_isbad;
mtd->_block_markbad = nand_block_markbad;
mtd->writebufsize = mtd->writesize;
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 7f0c3b4c2a4f..443fa82cde6a 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -1311,6 +1311,20 @@ int nand_default_bbt(struct mtd_info *mtd)
}
/**
+ * 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
* @offs: offset in the device