From aea0440ad023ab0662299326f941214b0d7480bd Mon Sep 17 00:00:00 2001 From: Avri Altman Date: Tue, 20 Apr 2021 16:46:41 +0300 Subject: mmc: block: Update ext_csd.cache_ctrl if it was written The cache function can be turned ON and OFF by writing to the CACHE_CTRL byte (EXT_CSD byte [33]). However, card->ext_csd.cache_ctrl is only set on init if cache size > 0. Fix that by explicitly setting ext_csd.cache_ctrl on ext-csd write. Signed-off-by: Avri Altman Acked-by: Adrian Hunter Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210420134641.57343-3-avri.altman@wdc.com Signed-off-by: Ulf Hansson --- drivers/mmc/core/block.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/mmc') diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 8bfd4d95b386..6cd5d03bcc64 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -572,6 +572,18 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK; } + /* + * Make sure to update CACHE_CTRL in case it was changed. The cache + * will get turned back on if the card is re-initialized, e.g. + * suspend/resume or hw reset in recovery. + */ + if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) && + (cmd.opcode == MMC_SWITCH)) { + u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1; + + card->ext_csd.cache_ctrl = value; + } + /* * According to the SD specs, some commands require a delay after * issuing the command. -- cgit v1.2.3