diff options
| author | Daniel Glöckner <dg@emlix.com> | 2016-08-30 14:17:30 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-02-23 03:54:04 +0000 |
| commit | 041ec31435e788f8aa9c32537de657d73cd89b27 (patch) | |
| tree | 70d2cfec25f960c7d1d2b8ef5dd43f06e9e6bb47 | |
| parent | bfd041f0c81082fe5d14102b59130eebb5358587 (diff) | |
mmc: block: don't use CMD23 with very old MMC cards
commit 0ed50abb2d8fc81570b53af25621dad560cd49b3 upstream.
CMD23 aka SET_BLOCK_COUNT was introduced with MMC v3.1.
Older versions of the specification allowed to terminate
multi-block transfers only with CMD12.
The patch fixes the following problem:
mmc0: new MMC card at address 0001
mmcblk0: mmc0:0001 SDMB-16 15.3 MiB
mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900
...
blk_update_request: I/O error, dev mmcblk0, sector 0
Buffer I/O error on dev mmcblk0, logical block 0, async page read
mmcblk0: unable to read partition table
Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/mmc/card/block.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 619c67b71ecb..c0617309fc45 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -2170,7 +2170,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, set_capacity(md->disk, size); if (mmc_host_cmd23(card->host)) { - if (mmc_card_mmc(card) || + if ((mmc_card_mmc(card) && + card->csd.mmca_vsn >= CSD_SPEC_VER_3) || (mmc_card_sd(card) && card->scr.cmds & SD_SCR_CMD23_SUPPORT)) md->flags |= MMC_BLK_CMD23; |