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- From 10c91a7a11bfada03809a19adfbc7197e19f2fea Mon Sep 17 00:00:00 2001
- From: Phil Elwell <phil@raspberrypi.org>
- Date: Wed, 11 May 2016 12:50:33 +0100
- Subject: [PATCH] mmc: Add MMC_QUIRK_ERASE_BROKEN for some cards
- Some SD cards have been found that corrupt data when small blocks
- are erased. Add a quirk to indicate that ERASE should not be used,
- and set it for cards of that type.
- Signed-off-by: Phil Elwell <phil@raspberrypi.org>
- ---
- drivers/mmc/card/block.c | 7 +++++++
- drivers/mmc/core/core.c | 3 ++-
- include/linux/mmc/card.h | 3 +++
- 3 files changed, 12 insertions(+), 1 deletion(-)
- --- a/drivers/mmc/card/block.c
- +++ b/drivers/mmc/card/block.c
- @@ -2547,6 +2547,13 @@ static const struct mmc_fixup blk_fixups
- MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
- MMC_QUIRK_TRIM_BROKEN),
-
- + /*
- + * On some Kingston SD cards, multiple erases of less than 64
- + * sectors can cause corruption.
- + */
- + MMC_FIXUP("SD16G", 0x41, 0x3432, add_quirk_mmc,
- + MMC_QUIRK_ERASE_BROKEN),
- +
- END_FIXUP
- };
-
- --- a/drivers/mmc/core/core.c
- +++ b/drivers/mmc/core/core.c
- @@ -2257,7 +2257,8 @@ EXPORT_SYMBOL(mmc_erase);
- int mmc_can_erase(struct mmc_card *card)
- {
- if ((card->host->caps & MMC_CAP_ERASE) &&
- - (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
- + (card->csd.cmdclass & CCC_ERASE) && card->erase_size &&
- + !(card->quirks & MMC_QUIRK_ERASE_BROKEN))
- return 1;
- return 0;
- }
- --- a/include/linux/mmc/card.h
- +++ b/include/linux/mmc/card.h
- @@ -281,6 +281,9 @@ struct mmc_card {
- #define MMC_QUIRK_TRIM_BROKEN (1<<12) /* Skip trim */
-
-
- +#define MMC_QUIRK_ERASE_BROKEN (1<<31) /* Skip erase */
- +
- +
- unsigned int erase_size; /* erase size in sectors */
- unsigned int erase_shift; /* if erase unit is power 2 */
- unsigned int pref_erase; /* in sectors */
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