[PATCH v3 3/3] mmc: dw_mmc: Don't start command while data busy

[Addy Ke]

We should wait for data busy here in non-volt-switch state.
This may happend when sdio sends CMD53.

Signed-off-by: Addy Ke <addy.ke at rock-chips.com>
---
 drivers/mmc/host/dw_mmc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index f0d9da5..23507c9 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1076,6 +1076,12 @@ static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	WARN_ON(slot->mrq);
 
 	/*
+	 * We should wait for data busy here in non-volt-switch state.
+	 * This may happend when sdio sends CMD53.
+	 */
+	dw_mci_wait_busy(slot);
+
+	/*
 	 * The check for card presence and queueing of the request must be
 	 * atomic, otherwise the card could be removed in between and the
 	 * request wouldn't fail until another card was inserted.
-- 
1.8.3.2