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mmc: mmc: Attempt to flush cache before reset 

CMD0 or hardware reset may invalidate the cache, so it needs to be
flushed before reset.

In the case of recovery, we can't expect flushing the cache to work
always, but have a go and ignore errors.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2016-05-04 10:38:21 +03:00 committed by Ulf Hansson
parent f3f44d512c
commit 437db4c6e7
1 changed files with 6 additions and 0 deletions
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6
drivers/mmc/core/mmc.c
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@ -1958,6 +1958,12 @@ static int mmc_reset(struct mmc_host *host)
{
struct mmc_card *card = host->card;
/*
* In the case of recovery, we can't expect flushing the cache to work
* always, but we have a go and ignore errors.
*/
mmc_flush_cache(host->card);
if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
mmc_can_reset(card)) {
/* If the card accept RST_n signal, send it. */