From 5f4d47d5d1060a93be83e33a167a53a7f8c08b20 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 6 Nov 2007 09:17:25 +0200 Subject: [PATCH] [MTD] [OneNAND] Do not stop reading for ECC errors When an ECC error occurs, the read should be completed anyway before returning -EBADMSG. Returning -EBADMSG straight away is incorrect. Signed-off-by: Adrian Hunter Acked-by: Kyungmin Park Signed-off-by: David Woodhouse --- drivers/mtd/onenand/onenand_base.c | 32 ++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 1b0b32011415..ed9f9c061ac5 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -855,6 +855,8 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, this->command(mtd, ONENAND_CMD_READ, from, writesize); ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); + if (ret == -EBADMSG) + ret = 0; } } @@ -913,6 +915,8 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, /* Now wait for load */ ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); + if (ret == -EBADMSG) + ret = 0; } /* @@ -923,12 +927,12 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, ops->retlen = read; ops->oobretlen = oobread; - if (mtd->ecc_stats.failed - stats.failed) - return -EBADMSG; - if (ret) return ret; + if (mtd->ecc_stats.failed - stats.failed) + return -EBADMSG; + return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; } @@ -944,6 +948,7 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { struct onenand_chip *this = mtd->priv; + struct mtd_ecc_stats stats; int read = 0, thislen, column, oobsize; size_t len = ops->ooblen; mtd_oob_mode_t mode = ops->mode; @@ -977,6 +982,8 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, return -EINVAL; } + stats = mtd->ecc_stats; + while (read < len) { cond_resched(); @@ -988,18 +995,16 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, onenand_update_bufferram(mtd, from, 0); ret = this->wait(mtd, FL_READING); - /* First copy data and check return value for ECC handling */ + if (ret && ret != -EBADMSG) { + printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret); + break; + } if (mode == MTD_OOB_AUTO) onenand_transfer_auto_oob(mtd, buf, column, thislen); else this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen); - if (ret) { - printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret); - break; - } - read += thislen; if (read == len) @@ -1016,7 +1021,14 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, } ops->oobretlen = read; - return ret; + + if (ret) + return ret; + + if (mtd->ecc_stats.failed - stats.failed) + return -EBADMSG; + + return 0; } /** -- 2.39.5