diff options
| author | Avri Altman <avri.altman@wdc.com> | 2021-04-20 16:46:41 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-04-23 10:11:17 +0200 |
| commit | aea0440ad023ab0662299326f941214b0d7480bd (patch) | |
| tree | 38b07daea517b32ec221902af94bb2dfb2a6cc12 /drivers/mmc/core | |
| parent | edd602146507532c1714d8428f654b87205f492e (diff) | |
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 <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>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/block.c | 12 |
1 files changed, 12 insertions, 0 deletions
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 @@ -573,6 +573,18 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, } /* + * 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. */ |