[JFFS2] Use point(), if available, to check newly erased blocks.
Faster and won't trash the D-cache. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
parent
7eafaed55f
commit
fab2c39912
|
@ -317,6 +317,33 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
|
|||
size_t retlen;
|
||||
int ret = -EIO;
|
||||
|
||||
if (c->mtd->point) {
|
||||
unsigned long *wordebuf;
|
||||
|
||||
ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen, (unsigned char **)&ebuf);
|
||||
if (ret) {
|
||||
D1(printk(KERN_DEBUG "MTD point failed %d\n", ret));
|
||||
goto do_flash_read;
|
||||
}
|
||||
if (retlen < c->sector_size) {
|
||||
/* Don't muck about if it won't let us point to the whole erase sector */
|
||||
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen));
|
||||
c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
|
||||
goto do_flash_read;
|
||||
}
|
||||
wordebuf = ebuf-sizeof(*wordebuf);
|
||||
retlen /= sizeof(*wordebuf);
|
||||
do {
|
||||
if (*++wordebuf != ~0)
|
||||
break;
|
||||
} while(--retlen);
|
||||
c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
|
||||
if (retlen)
|
||||
printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08x\n",
|
||||
*wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf));
|
||||
return 0;
|
||||
}
|
||||
do_flash_read:
|
||||
ebuf = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
||||
if (!ebuf) {
|
||||
printk(KERN_WARNING "Failed to allocate page buffer for verifying erase at 0x%08x. Refiling\n", jeb->offset);
|
||||
|
|
Loading…
Reference in a new issue