From 06c752756a452a0c59447836edce57ef7393be5c Mon Sep 17 00:00:00 2001 From: P33M Date: Tue, 13 Jan 2015 17:12:18 +0000 Subject: [PATCH 059/114] mmc: Disable CMD23 transfers on all cards Pending wire-level investigation of these types of transfers and associated errors on bcm2835-mmc, disable for now. Fallback of CMD18/CMD25 transfers will be used automatically by the MMC layer. Reported/Tested-by: Gellert Weisz --- drivers/mmc/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/mmc/core/quirks.c +++ b/drivers/mmc/core/quirks.c @@ -95,5 +95,9 @@ void mmc_fixup_device(struct mmc_card *c f->vendor_fixup(card, f->data); } } + /* SDHCI on BCM2708 - bug causes a certain sequence of CMD23 operations to fail. + * Disable this flag for all cards (fall-back to CMD25/CMD18 multi-block transfers). + */ + card->quirks |= MMC_QUIRK_BLK_NO_CMD23; } EXPORT_SYMBOL(mmc_fixup_device);