[PATCH v3 3/3] mmc: dw_mmc: Don't start command while data busy
addy.ke at rock-chips.com
Fri Feb 13 03:52:48 PST 2015
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
@@ -1076,6 +1076,12 @@ static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+ * We should wait for data busy here in non-volt-switch state.
+ * This may happend when sdio sends CMD53.
* 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.
More information about the Linux-rockchip