raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 10:00:17 +00:00
Code Issues Projects Releases Wiki Activity

mmc: Disable CMD23 transfers on all cards

Browse Source 
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 <gellert@raspberrypi.org>
This commit is contained in:
P33M
2015-01-13 17:12:18 +00:00
committed by popcornmix
parent 7219228132
commit 595cb0c3c5
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/mmc/core/quirks.c
View File

@@ -95,5 +95,9 @@ void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
f->vendor_fixup(card, f->data); 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); EXPORT_SYMBOL(mmc_fixup_device);