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authorAdrian Hunter <ext-adrian.hunter@nokia.com>2007-11-06 09:17:25 +0200
committerDavid Woodhouse <dwmw2@infradead.org>2007-11-26 13:16:29 +0000
commit5f4d47d5d1060a93be83e33a167a53a7f8c08b20 (patch)
treee3bd4b358774b59af30c8d23241cec19e29e9d76 /drivers/mtd
parentb1c9c9be6da010510459aca93f5754efb19695ff (diff)
[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 <ext-adrian.hunter@nokia.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/onenand/onenand_base.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 1b0b3201141..ed9f9c061ac 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;
}
/**