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Logfs: Allow NULL block_isbad() methods 

Not all mtd drivers define block_isbad().  Let's assume no bad blocks
instead of refusing to mount.

Signed-off-by: Joern Engel <joern@logfs.org>
This commit is contained in:
Joern Engel 2011-08-05 11:09:55 +02:00 committed by Prasad Joshi
parent bbe0138712
commit f2933e86ad
1 changed files with 12 additions and 14 deletions
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26
fs/logfs/dev_mtd.c
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@ -150,14 +150,13 @@ static struct page *mtd_find_first_sb(struct super_block *sb, u64 *ofs)
filler_t *filler = mtd_readpage;
struct mtd_info *mtd = super->s_mtd;
if (!mtd->block_isbad)
return NULL;
*ofs = 0;
while (mtd->block_isbad(mtd, *ofs)) {
*ofs += mtd->erasesize;
if (*ofs >= mtd->size)
return NULL;
if (mtd->block_isbad) {
while (mtd->block_isbad(mtd, *ofs)) {
*ofs += mtd->erasesize;
if (*ofs >= mtd->size)
return NULL;
}
}
BUG_ON(*ofs & ~PAGE_MASK);
return read_cache_page(mapping, *ofs >> PAGE_SHIFT, filler, sb);
@ -170,14 +169,13 @@ static struct page *mtd_find_last_sb(struct super_block *sb, u64 *ofs)
filler_t *filler = mtd_readpage;
struct mtd_info *mtd = super->s_mtd;
if (!mtd->block_isbad)
return NULL;
*ofs = mtd->size - mtd->erasesize;
while (mtd->block_isbad(mtd, *ofs)) {
*ofs -= mtd->erasesize;
if (*ofs <= 0)
return NULL;
if (mtd->block_isbad) {
while (mtd->block_isbad(mtd, *ofs)) {
*ofs -= mtd->erasesize;
if (*ofs <= 0)
return NULL;
}
}
*ofs = *ofs + mtd->erasesize - 0x1000;
BUG_ON(*ofs & ~PAGE_MASK);