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