diff mbox series

[v8,03/10] mmc: core: Don't use close-ended rw for SDUC

Message ID 20241006051148.160278-4-avri.altman@wdc.com (mailing list archive)
State New
Headers show
Series Add SDUC Support | expand

Commit Message

Avri Altman Oct. 6, 2024, 5:11 a.m. UTC 
The SDUC spec expects CMD22 to get squeezed between CMD23 and the
read/write command, e.g. CMD23->CMD22->CMD18 and CMD23->CMD22->CMD25.
At this early stage of adoption, we want to avoid an amid stream of
fixes & quirks of bogus hw, that tends to apply extra logic specifically
around auto-cmd12 & auto-cmd23.

Let's leave close-ended out for now, and re-consider this should those
cards become ubiquitous, if any.

It also means that BLK_FEAT_FUA will not be used for I/O, but instead we
will rely on BLK_FEAT_WRITE_CACHE.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/mmc/core/block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index ef06a4d5d65b..f4817ea3017b 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2547,7 +2547,7 @@  static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	if (mmc_host_cmd23(card->host)) {
 		if ((mmc_card_mmc(card) &&
 		     card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
-		    (mmc_card_sd(card) &&
+		    (mmc_card_sd(card) && !mmc_card_ult_capacity(card) &&
 		     card->scr.cmds & SD_SCR_CMD23_SUPPORT))
 			md->flags |= MMC_BLK_CMD23;
 	}