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

Addy Ke
2015-02-13T11:53:36Z

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@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