tree a20381bcaac4f7b02afd7bdc36f76a631906f5ce
parent bfabb98688e7089381baa0974f7ff6786ce2a2d0
author Thomas Gleixner <[EMAIL PROTECTED]> Tue, 14 Jun 2005 16:39:57 +0100
committer Thomas Gleixner <[EMAIL PROTECTED]> Wed, 29 Jun 2005 14:24:41 +0200
[MTD] NAND: Fix broken bad block table scan
Make the bad block table search functional again
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
drivers/mtd/nand/nand_bbt.c | 53 +++++++++++++++++++++++++++++++++++---------
1 files changed, 43 insertions(+), 10 deletions(-)
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 1.31 2005/02/16 17:09:36 dedekind Exp $
+ * $Id: nand_bbt.c,v 1.33 2005/06/14 15:47:56 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
@@ -80,14 +80,14 @@ static int check_pattern (uint8_t *buf,
int i, end = 0;
uint8_t *p = buf;
+ end = paglen + td->offs;
if (td->options & NAND_BBT_SCANEMPTY) {
- end = paglen + td->offs;
for (i = 0; i < end; i++) {
if (p[i] != 0xff)
return -1;
}
- p += end;
}
+ p += end;
/* Compare the pattern */
for (i = 0; i < td->len; i++) {
@@ -106,6 +106,32 @@ static int check_pattern (uint8_t *buf,
return 0;
}
+/**
+ * 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.
+ *
+*/
+static int check_short_pattern (uint8_t *buf, int len, int paglen, 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])
+ return -1;
+ }
+ return 0;
+}
+
/**
* read_bbt - [GENERIC] Read the bad block table starting from page
* @mtd: MTD device structure
@@ -316,18 +342,25 @@ static int create_bbt (struct mtd_info *
readlen, &retlen,
&buf[0]);
if (ret)
return ret;
- }
- if (check_pattern (&buf[j * scanlen], scanlen,
mtd->oobblock, bd)) {
- this->bbt[i >> 3] |= 0x03 << (i & 0x6);
- printk (KERN_WARNING "Bad eraseblock %d at
0x%08x\n",
- i >> 1, (unsigned int) from);
- break;
+
+ if (check_short_pattern (&buf[j * scanlen],
scanlen, mtd->oobblock, bd)) {
+ this->bbt[i >> 3] |= 0x03 << (i & 0x6);
+ printk (KERN_WARNING "Bad eraseblock %d
at 0x%08x\n",
+ i >> 1, (unsigned int) from);
+ break;
+ }
+ } else {
+ if (check_pattern (&buf[j * scanlen], scanlen,
mtd->oobblock, bd)) {
+ this->bbt[i >> 3] |= 0x03 << (i & 0x6);
+ printk (KERN_WARNING "Bad eraseblock %d
at 0x%08x\n",
+ i >> 1, (unsigned int) from);
+ break;
+ }
}
}
i += 2;
from += (1 << this->bbt_erase_shift);
}
-
return 0;
}
-
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
