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[MTD] Skip bad blocks when checking for RedBoot partition table 

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse 2007-10-28 21:57:02 -04:00
parent 9c37f3329a
commit 3c441baa03
1 changed files with 20 additions and 5 deletions
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25
drivers/mtd/redboot.c
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@ -59,16 +59,31 @@ static int parse_redboot_partitions(struct mtd_info *master,
static char nullstring[] = "unallocated";
#endif
if ( directory < 0 ) {
offset = master->size + directory * master->erasesize;
while (master->block_isbad &&
master->block_isbad(master, offset)) {
if (!offset) {
nogood:
printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n");
return -EIO;
}
offset -= master->erasesize;
}
} else {
offset = directory * master->erasesize;
while (master->block_isbad &&
master->block_isbad(master, offset)) {
offset += master->erasesize;
if (offset == master->size)
goto nogood;
}
}
buf = vmalloc(master->erasesize);
if (!buf)
return -ENOMEM;
if ( directory < 0 )
offset = master->size + directory*master->erasesize;
else
offset = directory*master->erasesize;
printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n",
master->name, offset);