[ Upstream commit 07d2872bf4c8 ]

Some SD-cards from Sandisk that are SDA-6.0 compliant reports they supports discard, while they actually don't. This might cause mk2fs to fail while trying to format the card and revert it to a read-only mode.

To fix this problem, let's add a card quirk (MMC_QUIRK_BROKEN_SD_DISCARD) to indicate that we shall fall-back to use the legacy erase command instead.

Signed-off-by: Avri Altman avri.altman@wdc.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220928095744.16455-1-avri.altman@wdc.com [Ulf: Updated the commit message] Signed-off-by: Ulf Hansson ulf.hansson@linaro.org --- drivers/mmc/core/block.c | 7 ++++++- drivers/mmc/core/card.h | 6 ++++++ drivers/mmc/core/quirks.h | 6 ++++++ include/linux/mmc/card.h | 1 + 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 431af5e8be2f..c8e996ee4745 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1107,6 +1107,11 @@ static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) nr = blk_rq_sectors(req);

do { + unsigned int erase_arg = card->erase_arg; + + if (mmc_card_broken_sd_discard(card)) + erase_arg = SD_ERASE_ARG; + err = 0; if (card->quirks & MMC_QUIRK_INAND_CMD38) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, @@ -1117,7 +1122,7 @@ static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) card->ext_csd.generic_cmd6_time); } if (!err) - err = mmc_erase(card, from, nr, card->erase_arg); + err = mmc_erase(card, from, nr, erase_arg); } while (err == -EIO && !mmc_blk_reset(md, card->host, type)); if (err) status = BLK_STS_IOERR; diff --git a/drivers/mmc/core/card.h b/drivers/mmc/core/card.h index 7bd392d55cfa..5c6986131faf 100644 --- a/drivers/mmc/core/card.h +++ b/drivers/mmc/core/card.h @@ -70,6 +70,7 @@ struct mmc_fixup { #define EXT_CSD_REV_ANY (-1u)

#define CID_MANFID_SANDISK 0x2 +#define CID_MANFID_SANDISK_SD 0x3 #define CID_MANFID_ATP 0x9 #define CID_MANFID_TOSHIBA 0x11 #define CID_MANFID_MICRON 0x13 @@ -222,4 +223,9 @@ static inline int mmc_card_broken_hpi(const struct mmc_card *c) return c->quirks & MMC_QUIRK_BROKEN_HPI; }

+static inline int mmc_card_broken_sd_discard(const struct mmc_card *c) +{ + return c->quirks & MMC_QUIRK_BROKEN_SD_DISCARD; +} + #endif diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h index d68e6e513a4f..c8c0f50a2076 100644 --- a/drivers/mmc/core/quirks.h +++ b/drivers/mmc/core/quirks.h @@ -99,6 +99,12 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = { MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc, MMC_QUIRK_TRIM_BROKEN),

+ /* + * Some SD cards reports discard support while they don't + */ + MMC_FIXUP(CID_NAME_ANY, CID_MANFID_SANDISK_SD, 0x5344, add_quirk_sd, + MMC_QUIRK_BROKEN_SD_DISCARD), + END_FIXUP };

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 37f975875102..12c7f2d3e210 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -292,6 +292,7 @@ struct mmc_card { #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 */ #define MMC_QUIRK_BROKEN_HPI (1<<13) /* Disable broken HPI support */ +#define MMC_QUIRK_BROKEN_SD_DISCARD (1<<14) /* Disable broken SD discard support */

bool reenable_cmdq; /* Re-enable Command Queue */