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[MTD] mtdoops: Add further error return code checking 

Add further error return code checks to the mtdoops driver.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Richard Purdie 2008-01-29 11:27:09 +00:00 committed by David Woodhouse
parent 0bdf77f85b
commit 2986bd2a33
1 changed files with 29 additions and 12 deletions
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41
drivers/mtd/mtdoops.c
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@ -103,7 +103,7 @@ static int mtdoops_inc_counter(struct mtdoops_context *cxt)
ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4,
&retlen, (u_char *) &count);
if ((retlen != 4) || (ret < 0)) {
if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) {
printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)"
", err %d.\n", cxt->nextpage * OOPS_PAGE_SIZE,
retlen, ret);
@ -136,8 +136,14 @@ static void mtdoops_prepare(struct mtdoops_context *cxt)
cxt->nextpage = 0;
}
while (mtd->block_isbad &&
mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE)) {
while (mtd->block_isbad) {
ret = mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
if (!ret)
break;
if (ret < 0) {
printk(KERN_ERR "mtdoops: block_isbad failed, aborting.\n");
return;
}
badblock:
printk(KERN_WARNING "mtdoops: Bad block at %08x\n",
cxt->nextpage * OOPS_PAGE_SIZE);
@ -154,15 +160,20 @@ static void mtdoops_prepare(struct mtdoops_context *cxt)
for (j = 0, ret = -1; (j < 3) && (ret < 0); j++)
ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
if (ret < 0) {
if (mtd->block_markbad)
mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
goto badblock;
if (ret >= 0) {
printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount);
cxt->ready = 1;
return;
}
printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount);
cxt->ready = 1;
if (mtd->block_markbad && (ret == -EIO)) {
ret = mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
if (ret < 0) {
printk(KERN_ERR "mtdoops: block_markbad failed, aborting.\n");
return;
}
}
goto badblock;
}
static void mtdoops_workfunc(struct work_struct *work)
@ -176,12 +187,18 @@ static void mtdoops_workfunc(struct work_struct *work)
static int find_next_position(struct mtdoops_context *cxt)
{
struct mtd_info *mtd = cxt->mtd;
int page, maxpos = 0;
int ret, page, maxpos = 0;
u32 count, maxcount = 0xffffffff;
size_t retlen;
for (page = 0; page < cxt->oops_pages; page++) {
mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count);
ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count);
if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) {
printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)"
", err %d.\n", page * OOPS_PAGE_SIZE, retlen, ret);
continue;
}
if (count == 0xffffffff)
continue;
if (maxcount == 0xffffffff) {