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mmc: block: Update ext_csd.cache_ctrl if it was written

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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 <avri.altman@wdc.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210420134641.57343-3-avri.altman@wdc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Avri Altman 2021-04-20 16:46:41 +03:00 committed by Ulf Hansson
parent edd6021465
commit aea0440ad0
1 changed files with 12 additions and 0 deletions
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12
drivers/mmc/core/block.c
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@ -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.