From: Maxim Levitsky <maximlevitsky@gmail.com>
Date: Mon, 22 Feb 2010 18:39:35 +0000 (+0200)
Subject: mtd: nand: make MTD_OOB_PLACE work correctly.
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9aca334e854c319ccafea871006fda3814196e7b;p=openwrt%2Fstaging%2Fblogic.git

mtd: nand: make MTD_OOB_PLACE work correctly.

MTD_OOB_PLACE is supposed to read/write the raw oob data similiar to the
MTD_OOB_RAW however due to a bug, currently it is not possible to read
more data that is specified by the oob 'free' regions.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 7442b3a29b25..cada4cffacf8 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1420,6 +1420,9 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 	int ret = 0;
 	uint32_t readlen = ops->len;
 	uint32_t oobreadlen = ops->ooblen;
+	uint32_t max_oobsize = ops->mode == MTD_OOB_AUTO ?
+		mtd->oobavail : mtd->oobsize;
+
 	uint8_t *bufpoi, *oob, *buf;
 
 	stats = mtd->ecc_stats;
@@ -1470,10 +1473,11 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 			buf += bytes;
 
 			if (unlikely(oob)) {
+
 				/* Raw mode does data:oob:data:oob */
 				if (ops->mode != MTD_OOB_RAW) {
 					int toread = min(oobreadlen,
-						chip->ecc.layout->oobavail);
+								max_oobsize);
 					if (toread) {
 						oob = nand_transfer_oob(chip,
 							oob, ops, toread);