Commit 437db4c6 authored May 04, 2016 by Adrian Hunter Committed by Ulf Hansson May 04, 2016

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>

parent f3f44d51

drivers/mmc/core/mmc.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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. */