[PATCH] mmc: core: Attempt to flush cache before reset

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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@xxxxxxxxx>
---
 drivers/mmc/core/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 99275e40bf2f..1b4e0ccb0885 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2453,6 +2453,12 @@ int mmc_hw_reset(struct mmc_host *host)
 		return -EOPNOTSUPP;
 	}
 
+	/*
+	 * 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);
+
 	ret = host->bus_ops->reset(host);
 	mmc_bus_put(host);
 
-- 
1.9.1

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