mtd: nand: Add a NAND_CMD_STATUS when using write verification

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=09cbe581e346229e33c48da00439419ff2fe6af7
Commit:     09cbe581e346229e33c48da00439419ff2fe6af7
Parent:     b6778fd7812d877abdbc78b9b2d4304150b2ce05
Author:     Bastian Hecht <hechtb at googlemail.com>
AuthorDate: Fri Apr 27 12:19:31 2012 +0200
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Sun May 13 23:09:36 2012 -0500

    mtd: nand: Add a NAND_CMD_STATUS when using write verification
    
    To make sure the NAND chip is properly programmed we need a status
    command before each page write. When CONFIG_MTD_NAND_VERIFY_WRITE=y this
    assumption is broken when writing multiple pages consecutively. This
    patch fixes this.
    
    Signed-off-by: Bastian Hecht <hechtb at gmail.com>
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 drivers/mtd/nand/nand_base.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index eb88d8b..512066e 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2118,6 +2118,9 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 
 	if (chip->verify_buf(mtd, buf, mtd->writesize))
 		return -EIO;
+
+	/* Make sure the next page prog is preceded by a status read */
+	chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
 #endif
 	return 0;
 }