From 657f28f8811c92724db10d18bbbec70d540147d6 Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Tue, 14 Aug 2012 22:38:45 -0400 Subject: mtd: kill MTD_NAND_VERIFY_WRITE Just as Artem suggested: "Both UBI and JFFS2 are able to read verify what they wrote already. There are also MTD tests which do this verification. So I think there is no reason to keep this in the NAND layer, let alone wasting RAM in the driver to support this feature. Besides, it does not work for sub-pages and many drivers have it broken. It hurts more than it provides benefits." So kill MTD_NAND_VERIFY_WRITE entirely. Signed-off-by: Huang Shijie Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/mpc5121_nfc.c | 22 ---------------------- 1 file changed, 22 deletions(-) (limited to 'drivers/mtd/nand/mpc5121_nfc.c') diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c index c259c24d7986..f776c8577b8c 100644 --- a/drivers/mtd/nand/mpc5121_nfc.c +++ b/drivers/mtd/nand/mpc5121_nfc.c @@ -506,27 +506,6 @@ static void mpc5121_nfc_write_buf(struct mtd_info *mtd, mpc5121_nfc_buf_copy(mtd, (u_char *)buf, len, 1); } -/* Compare buffer with NAND flash */ -static int mpc5121_nfc_verify_buf(struct mtd_info *mtd, - const u_char *buf, int len) -{ - u_char tmp[256]; - uint bsize; - - while (len) { - bsize = min(len, 256); - mpc5121_nfc_read_buf(mtd, tmp, bsize); - - if (memcmp(buf, tmp, bsize)) - return 1; - - buf += bsize; - len -= bsize; - } - - return 0; -} - /* Read byte from NFC buffers */ static u8 mpc5121_nfc_read_byte(struct mtd_info *mtd) { @@ -732,7 +711,6 @@ static int __devinit mpc5121_nfc_probe(struct platform_device *op) chip->read_word = mpc5121_nfc_read_word; chip->read_buf = mpc5121_nfc_read_buf; chip->write_buf = mpc5121_nfc_write_buf; - chip->verify_buf = mpc5121_nfc_verify_buf; chip->select_chip = mpc5121_nfc_select_chip; chip->bbt_options = NAND_BBT_USE_FLASH; chip->ecc.mode = NAND_ECC_SOFT; -- cgit v1.2.1