2015-02-11 10:17:55 +00:00
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From 06c752756a452a0c59447836edce57ef7393be5c Mon Sep 17 00:00:00 2001
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From: P33M <P33M@github.com>
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Date: Tue, 13 Jan 2015 17:12:18 +0000
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Subject: [PATCH 059/114] mmc: Disable CMD23 transfers on all cards
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Pending wire-level investigation of these types of transfers
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and associated errors on bcm2835-mmc, disable for now. Fallback of
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CMD18/CMD25 transfers will be used automatically by the MMC layer.
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Reported/Tested-by: Gellert Weisz <gellert@raspberrypi.org>
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---
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drivers/mmc/core/quirks.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/drivers/mmc/core/quirks.c
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+++ b/drivers/mmc/core/quirks.c
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2015-02-13 07:38:27 +00:00
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@@ -95,5 +95,9 @@ void mmc_fixup_device(struct mmc_card *c
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2015-02-11 10:17:55 +00:00
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f->vendor_fixup(card, f->data);
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}
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}
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+ /* SDHCI on BCM2708 - bug causes a certain sequence of CMD23 operations to fail.
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+ * Disable this flag for all cards (fall-back to CMD25/CMD18 multi-block transfers).
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+ */
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+ card->quirks |= MMC_QUIRK_BLK_NO_CMD23;
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}
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EXPORT_SYMBOL(mmc_fixup_device);
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