diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0348-mmc-Add-MMC_QUIRK_ERASE_BROKEN-for-some-cards.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0348-mmc-Add-MMC_QUIRK_ERASE_BROKEN-for-some-cards.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0348-mmc-Add-MMC_QUIRK_ERASE_BROKEN-for-some-cards.patch b/target/linux/brcm2708/patches-4.4/0348-mmc-Add-MMC_QUIRK_ERASE_BROKEN-for-some-cards.patch new file mode 100644 index 0000000000..852f47b2e9 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0348-mmc-Add-MMC_QUIRK_ERASE_BROKEN-for-some-cards.patch @@ -0,0 +1,56 @@ +From 8b01bab8c89fd4930ad304b5a7b3c1f6016c3743 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 +@@ -2552,6 +2552,13 @@ 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 +@@ -2253,7 +2253,8 @@ 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 */ |