[PATCH v3 3/3] mmc: dw_mmc: Don't start command while data busy
From: Addy Ke <hidden>
Date: 2015-02-13 11:53:36
Also in:
linux-mmc, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, synopsys designware mmc/sd/sdio driver, the rest · Maintainers:
Ulf Hansson, Jaehoon Chung, Shawn Lin, Linus Torvalds
We should wait for data busy here in non-volt-switch state. This may happend when sdio sends CMD53. Signed-off-by: Addy Ke <redacted> --- 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