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mmc: block: skip trim for some kingston eMMCs

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For some mass production of kingston eMMCs which adopt Phison's
firmware will meet an unrecoverable data conrruption occasionally
if performing trim due to a firmware bug confirmed by vendor. We
found it on Intel-C3230RK platform. So we add fixup of broken trim
for it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shawn Lin 2015-08-12 13:08:32 +08:00 committed by Ulf Hansson
parent e31e67cf25
commit b5b4ff0a63
3 changed files with 14 additions and 1 deletions
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10
drivers/mmc/card/block.c
View file

@ -2389,6 +2389,7 @@ force_ro_fail:
#define CID_MANFID_TOSHIBA 0x11
#define CID_MANFID_MICRON 0x13
#define CID_MANFID_SAMSUNG 0x15
#define CID_MANFID_KINGSTON 0x70
static const struct mmc_fixup blk_fixups[] =
{
@ -2451,6 +2452,15 @@ static const struct mmc_fixup blk_fixups[] =
MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
/*
* On Some Kingston eMMCs, performing trim can result in
* unrecoverable data conrruption occasionally due to a firmware bug.
*/
MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
MMC_QUIRK_TRIM_BROKEN),
MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
MMC_QUIRK_TRIM_BROKEN),
END_FIXUP
};

3
drivers/mmc/core/core.c
View file

@ -2250,7 +2250,8 @@ EXPORT_SYMBOL(mmc_can_erase);
int mmc_can_trim(struct mmc_card *card)
{
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) &&
(!(card->quirks & MMC_QUIRK_TRIM_BROKEN)))
return 1;
return 0;
}

2
include/linux/mmc/card.h
View file

@ -279,6 +279,8 @@ struct mmc_card {
#define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read time > CSD says */
#define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10) /* Skip secure for erase/trim */
#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx could create a fake interrupt */
#define MMC_QUIRK_TRIM_BROKEN (1<<12) /* Skip trim */
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2 */