mtd: atmel_nand: add a definition for the oob reserved bytes
It's better to use a macro instead of just a number.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index feaac90..0361c19 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -485,7 +485,7 @@
for (i = 0; i < ecc_len; i++)
layout->eccpos[i] = oobsize - ecc_len + i;
- layout->oobfree[0].offset = 2;
+ layout->oobfree[0].offset = PMECC_OOB_RESERVED_BYTES;
layout->oobfree[0].length =
oobsize - ecc_len - layout->oobfree[0].offset;
}
@@ -1254,7 +1254,8 @@
nand_chip->ecc.steps = mtd->writesize / sector_size;
nand_chip->ecc.total = nand_chip->ecc.bytes *
nand_chip->ecc.steps;
- if (nand_chip->ecc.total > mtd->oobsize - 2) {
+ if (nand_chip->ecc.total >
+ mtd->oobsize - PMECC_OOB_RESERVED_BYTES) {
dev_err(host->dev, "No room for ECC bytes\n");
err_no = -EINVAL;
goto err;
diff --git a/drivers/mtd/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h
index d4035e3..668e735 100644
--- a/drivers/mtd/nand/atmel_nand_ecc.h
+++ b/drivers/mtd/nand/atmel_nand_ecc.h
@@ -152,4 +152,7 @@
/* Time out value for reading PMECC status register */
#define PMECC_MAX_TIMEOUT_MS 100
+/* Reserved bytes in oob area */
+#define PMECC_OOB_RESERVED_BYTES 2
+
#endif