static void mtdoops_write(struct mtdoops_context *cxt, int panic)
{
struct mtd_info *mtd = cxt->mtd;
size_t retlen;
u32 *hdr;
int ret;
/* Add mtdoops header to the buffer */
hdr = cxt->oops_buf;
hdr[0] = cxt->nextcount;
hdr[1] = MTDOOPS_KERNMSG_MAGIC;
if (panic)
ret = mtd->panic_write(mtd, cxt->nextpage * record_size,
record_size, &retlen, cxt->oops_buf);
else
ret = mtd->write(mtd, cxt->nextpage * record_size,
record_size, &retlen, cxt->oops_buf);
if (retlen != record_size || ret < 0)
printk(KERN_ERR "mtdoops: write failure at %ld (%td of %ld written), error %d\n",
cxt->nextpage * record_size, retlen, record_size, ret);
mark_page_used(cxt, cxt->nextpage);
memset(cxt->oops_buf, 0xff, record_size);
mtdoops_inc_counter(cxt);
}
static void find_next_position(struct mtdoops_context *cxt)
{
struct mtd_info *mtd = cxt->mtd;
int ret, page, maxpos = 0;
u32 count[2], maxcount = 0xffffffff;
size_t retlen;
for (page = 0; page < cxt->oops_pages; page++) {
if (mtd_can_have_bb(mtd) &&
mtd_block_isbad(mtd, page * record_size))
continue;
/* Assume the page is used */
mark_page_used(cxt, page);
ret = mtd_read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,
&retlen, (u_char *)&count[0]);
if (retlen != MTDOOPS_HEADER_SIZE ||
(ret < 0 && !mtd_is_bitflip(ret))) {
printk(KERN_ERR "mtdoops: read failure at %ld (%td of %d read), err %d\n",
page * record_size, retlen,
MTDOOPS_HEADER_SIZE, ret);
continue;
}
if (count[0] == 0xffffffff && count[1] == 0xffffffff)
mark_page_unused(cxt, page);
if (count[0] == 0xffffffff)
continue;
if (maxcount == 0xffffffff) {
maxcount = count[0];
maxpos = page;
} else if (count[0] < 0x40000000 && maxcount > 0xc0000000) {
maxcount = count[0];
maxpos = page;
} else if (count[0] > maxcount && count[0] < 0xc0000000) {
maxcount = count[0];
maxpos = page;
} else if (count[0] > maxcount && count[0] > 0xc0000000
&& maxcount > 0x80000000) {
maxcount = count[0];
maxpos = page;
}
}
if (maxcount == 0xffffffff) {
cxt->nextpage = 0;
cxt->nextcount = 1;
schedule_work(&cxt->work_erase);
return;
}
cxt->nextpage = maxpos;
cxt->nextcount = maxcount;
mtdoops_inc_counter(cxt);
}
static void find_next_position(struct mtdoops_context *cxt)
{
struct mtd_info *mtd = cxt->mtd;
int ret, page, maxpos = 0;
u32 count[2], maxcount = 0xffffffff;
size_t retlen;
for (page = 0; page < cxt->oops_pages; page++) {
/* Assume the page is used */
mark_page_used(cxt, page);
if (mtd->block_isbad && mtd->block_isbad(mtd, page * record_size))
continue;
ret = mtd->read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,
&retlen, (u_char *) &count[0]);
if (retlen != MTDOOPS_HEADER_SIZE ||
(ret < 0 && ret != -EUCLEAN)) {
printk(KERN_ERR "mtdoops: read failure at %ld (%td of %d read), err %d\n",
page * record_size, retlen,
MTDOOPS_HEADER_SIZE, ret);
continue;
}
if (count[0] == 0xffffffff && count[1] == 0xffffffff)
mark_page_unused(cxt, page);
if (count[0] == 0xffffffff || count[1] != MTDOOPS_KERNMSG_MAGIC)
continue;
if (maxcount == 0xffffffff) {
maxcount = count[0];
maxpos = page;
} else if (count[0] < 0x40000000 && maxcount > 0xc0000000) {
maxcount = count[0];
maxpos = page;
} else if (count[0] > maxcount && count[0] < 0xc0000000) {
maxcount = count[0];
maxpos = page;
} else if (count[0] > maxcount && count[0] > 0xc0000000
&& maxcount > 0x80000000) {
maxcount = count[0];
maxpos = page;
}
}
if (maxcount == 0xffffffff) {
cxt->nextpage = cxt->oops_pages - 1;
cxt->nextcount = 0;
}
else {
cxt->nextpage = maxpos;
cxt->nextcount = maxcount;
}
mtdoops_inc_counter(cxt);
}
