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Two MTD fixes for 3.5:

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- Fix a logic error in OLPC CAFÉ NAND ready() function.
 - Fix regression due to bitflip handling changes.
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Merge tag 'for-linus-20120706' of git://git.infradead.org/linux-mtd

Pull two MTD fixes from David Woodhouse:
 - Fix a logic error in OLPC CAFÉ NAND ready() function.
 - Fix regression due to bitflip handling changes.

* tag 'for-linus-20120706' of git://git.infradead.org/linux-mtd:
  mtd: cafe_nand: fix an & vs | mistake
  mtd: nand: initialize bitflip_threshold prior to BBT scanning
This commit is contained in:
Linus Torvalds 2012-07-06 10:34:48 -07:00
commit af9b9a53fa
2 changed files with 8 additions and 1 deletions
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2
drivers/mtd/nand/cafe_nand.c
View File

@ -102,7 +102,7 @@ static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
static int cafe_device_ready(struct mtd_info *mtd) static int cafe_device_ready(struct mtd_info *mtd)
{ {
struct cafe_priv *cafe = mtd->priv; struct cafe_priv *cafe = mtd->priv;
int result = !!(cafe_readl(cafe, NAND_STATUS) | 0x40000000); int result = !!(cafe_readl(cafe, NAND_STATUS) & 0x40000000);
uint32_t irqs = cafe_readl(cafe, NAND_IRQ); uint32_t irqs = cafe_readl(cafe, NAND_IRQ);
cafe_writel(cafe, irqs, NAND_IRQ); cafe_writel(cafe, irqs, NAND_IRQ);

7
drivers/mtd/nand/nand_base.c
View File

@ -3501,6 +3501,13 @@ int nand_scan_tail(struct mtd_info *mtd)
/* propagate ecc info to mtd_info */ /* propagate ecc info to mtd_info */
mtd->ecclayout = chip->ecc.layout; mtd->ecclayout = chip->ecc.layout;
mtd->ecc_strength = chip->ecc.strength; mtd->ecc_strength = chip->ecc.strength;
/*
* Initialize bitflip_threshold to its default prior scan_bbt() call.
* scan_bbt() might invoke mtd_read(), thus bitflip_threshold must be
* properly set.
*/
if (!mtd->bitflip_threshold)
mtd->bitflip_threshold = mtd->ecc_strength;
/* Check, if we should skip the bad block table scan */ /* Check, if we should skip the bad block table scan */
if (chip->options & NAND_SKIP_BBTSCAN) if (chip->options & NAND_SKIP_BBTSCAN)