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path: root/drivers/mtd/nand/nand_bbt.c
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Diffstat (limited to 'drivers/mtd/nand/nand_bbt.c')
-rw-r--r--drivers/mtd/nand/nand_bbt.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 5ac2d2962220..7535ef53685e 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -6,7 +6,7 @@
6 * 6 *
7 * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de) 7 * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
8 * 8 *
9 * $Id: nand_bbt.c,v 1.33 2005/06/14 15:47:56 gleixner Exp $ 9 * $Id: nand_bbt.c,v 1.35 2005/07/15 13:53:47 gleixner Exp $
10 * 10 *
11 * This program is free software; you can redistribute it and/or modify 11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as 12 * it under the terms of the GNU General Public License version 2 as
@@ -109,24 +109,21 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
109/** 109/**
110 * check_short_pattern - [GENERIC] check if a pattern is in the buffer 110 * check_short_pattern - [GENERIC] check if a pattern is in the buffer
111 * @buf: the buffer to search 111 * @buf: the buffer to search
112 * @len: the length of buffer to search
113 * @paglen: the pagelength
114 * @td: search pattern descriptor 112 * @td: search pattern descriptor
115 * 113 *
116 * Check for a pattern at the given place. Used to search bad block 114 * Check for a pattern at the given place. Used to search bad block
117 * tables and good / bad block identifiers. Same as check_pattern, but 115 * tables and good / bad block identifiers. Same as check_pattern, but
118 * no optional empty check and the pattern is expected to start 116 * no optional empty check
119 * at offset 0.
120 * 117 *
121*/ 118*/
122static int check_short_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td) 119static int check_short_pattern (uint8_t *buf, struct nand_bbt_descr *td)
123{ 120{
124 int i; 121 int i;
125 uint8_t *p = buf; 122 uint8_t *p = buf;
126 123
127 /* Compare the pattern */ 124 /* Compare the pattern */
128 for (i = 0; i < td->len; i++) { 125 for (i = 0; i < td->len; i++) {
129 if (p[i] != td->pattern[i]) 126 if (p[td->offs + i] != td->pattern[i])
130 return -1; 127 return -1;
131 } 128 }
132 return 0; 129 return 0;
@@ -337,13 +334,14 @@ static int create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
337 if (!(bd->options & NAND_BBT_SCANEMPTY)) { 334 if (!(bd->options & NAND_BBT_SCANEMPTY)) {
338 size_t retlen; 335 size_t retlen;
339 336
340 /* No need to read pages fully, just read required OOB bytes */ 337 /* Read the full oob until read_oob is fixed to
341 ret = mtd->read_oob(mtd, from + j * mtd->oobblock + bd->offs, 338 * handle single byte reads for 16 bit buswidth */
342 readlen, &retlen, &buf[0]); 339 ret = mtd->read_oob(mtd, from + j * mtd->oobblock,
340 mtd->oobsize, &retlen, buf);
343 if (ret) 341 if (ret)
344 return ret; 342 return ret;
345 343
346 if (check_short_pattern (&buf[j * scanlen], scanlen, mtd->oobblock, bd)) { 344 if (check_short_pattern (buf, bd)) {
347 this->bbt[i >> 3] |= 0x03 << (i & 0x6); 345 this->bbt[i >> 3] |= 0x03 << (i & 0x6);
348 printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n", 346 printk (KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
349 i >> 1, (unsigned int) from); 347 i >> 1, (unsigned int) from);