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Commit 2986bd2a authored by Richard Purdie's avatar Richard Purdie Committed by David Woodhouse
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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: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent 0bdf77f8

drivers/mtd/mtdoops.c

+29 −12
Original line number Diff line number Diff line
@@ -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 @@ badblock: 
	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;

	}



	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) {