From 1951f2f710a621ae0bc4268617046a6c02c634d0 Mon Sep 17 00:00:00 2001 From: Shmulik Ladkani Date: Wed, 9 May 2012 13:13:34 +0300 Subject: [PATCH] mtd: nand: check the return code of 'read_oob/read_oob_raw' Apparently, there is an implementor of 'read_oob' which may return an error inidication (e.g. docg4_read_oob may return -EIO). Test the return value of 'read_oob/read_oob_raw', and if negative, propagate the error, so it's returned by the '_read_oob' interface. Signed-off-by: Shmulik Ladkani Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/nand_base.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 4047d7c..d47586c 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1791,6 +1791,7 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, int readlen = ops->ooblen; int len; uint8_t *buf = ops->oobbuf; + int ret = 0; pr_debug("%s: from = 0x%08Lx, len = %i\n", __func__, (unsigned long long)from, readlen); @@ -1826,9 +1827,12 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, while (1) { if (ops->mode == MTD_OPS_RAW) - chip->ecc.read_oob_raw(mtd, chip, page); + ret = chip->ecc.read_oob_raw(mtd, chip, page); else - chip->ecc.read_oob(mtd, chip, page); + ret = chip->ecc.read_oob(mtd, chip, page); + + if (ret < 0) + break; len = min(len, readlen); buf = nand_transfer_oob(chip, buf, ops, len); @@ -1857,7 +1861,10 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, } } - ops->oobretlen = ops->ooblen; + ops->oobretlen = ops->ooblen - readlen; + + if (ret < 0) + return ret; if (mtd->ecc_stats.failed - stats.failed) return -EBADMSG; -- 2.7.4