tree 3f8d07e75dc9895c52c2184d28e3c43a84b0234b
parent 2c4eec9802ae753a4973f0a0d71f8d154e86fd31
author Thomas Gleixner <[EMAIL PROTECTED]> Fri, 15 Jul 2005 14:53:51 +0100
committer Thomas Gleixner <[EMAIL PROTECTED]> Sat, 16 Jul 2005 09:27:52 +0200
[MTD] NAND: Fix broken bad block scan for 16 bit devices
The previous change to read a single byte from oob breaks the
bad block scan on 16 bit devices, when the byte is on an odd
address. Read the complete oob for now.
Remove the unused arguments from check_short_pattern()
Move the wait for ready function so it is only executed when
consecutive reads happen.
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
drivers/mtd/nand/nand_base.c | 22 +++++++++++-----------
drivers/mtd/nand/nand_bbt.c | 20 +++++++++-----------
2 files changed, 20 insertions(+), 22 deletions(-)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -59,7 +59,7 @@
* The AG-AND chips have nice features for speed improvement,
* which are not supported yet. Read / program 4 pages in one go.
*
- * $Id: nand_base.c,v 1.146 2005/06/17 15:02:06 gleixner Exp $
+ * $Id: nand_base.c,v 1.147 2005/07/15 07:18:06 gleixner Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -1409,16 +1409,6 @@ static int nand_read_oob (struct mtd_inf
thislen = min_t(int, thislen, len);
this->read_buf(mtd, &buf[i], thislen);
i += thislen;
-
- /* Apply delay or wait for ready/busy pin
- * Do this before the AUTOINCR check, so no problems
- * arise if a chip which does auto increment
- * is marked as NOAUTOINCR by the board driver.
- */
- if (!this->dev_ready)
- udelay (this->chip_delay);
- else
- nand_wait_ready(mtd);
/* Read more ? */
if (i < len) {
@@ -1432,6 +1422,16 @@ static int nand_read_oob (struct mtd_inf
this->select_chip(mtd, chipnr);
}
+ /* Apply delay or wait for ready/busy pin
+ * Do this before the AUTOINCR check, so no problems
+ * arise if a chip which does auto increment
+ * is marked as NOAUTOINCR by the board driver.
+ */
+ if (!this->dev_ready)
+ udelay (this->chip_delay);
+ else
+ nand_wait_ready(mtd);
+
/* Check, if the chip supports auto page increment
* or if we have hit a block boundary.
*/
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -6,7 +6,7 @@
*
* Copyright (C) 2004 Thomas Gleixner ([EMAIL PROTECTED])
*
- * $Id: nand_bbt.c,v 1.33 2005/06/14 15:47:56 gleixner Exp $
+ * $Id: nand_bbt.c,v 1.35 2005/07/15 13:53:47 gleixner Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -109,24 +109,21 @@ static int check_pattern (uint8_t *buf,
/**
* check_short_pattern - [GENERIC] check if a pattern is in the buffer
* @buf: the buffer to search
- * @len: the length of buffer to search
- * @paglen: the pagelength
* @td: search pattern descriptor
*
* Check for a pattern at the given place. Used to search bad block
* tables and good / bad block identifiers. Same as check_pattern, but
- * no optional empty check and the pattern is expected to start
- * at offset 0.
+ * no optional empty check
*
*/
-static int check_short_pattern (uint8_t *buf, int len, int paglen, struct
nand_bbt_descr *td)
+static int check_short_pattern (uint8_t *buf, struct nand_bbt_descr *td)
{
int i;
uint8_t *p = buf;
/* Compare the pattern */
for (i = 0; i < td->len; i++) {
- if (p[i] != td->pattern[i])
+ if (p[td->offs + i] != td->pattern[i])
return -1;
}
return 0;
@@ -337,13 +334,14 @@ static int create_bbt (struct mtd_info *
if (!(bd->options & NAND_BBT_SCANEMPTY)) {
size_t retlen;
- /* No need to read pages fully, just read
required OOB bytes */
- ret = mtd->read_oob(mtd, from + j *
mtd->oobblock + bd->offs,
- readlen, &retlen,
&buf[0]);
+ /* Read the full oob until read_oob is fixed to
+ * handle single byte reads for 16 bit buswidth
*/
+ ret = mtd->read_oob(mtd, from + j *
mtd->oobblock,
+ mtd->oobsize, &retlen,
buf);
if (ret)
return ret;
- if (check_short_pattern (&buf[j * scanlen],
scanlen, mtd->oobblock, bd)) {
+ if (check_short_pattern (buf, bd)) {
this->bbt[i >> 3] |= 0x03 << (i & 0x6);
printk (KERN_WARNING "Bad eraseblock %d
at 0x%08x\n",
i >> 1, (unsigned int) from);
-
To unsubscribe from this list: send the line "unsubscribe bk-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
