[PATCH v2 2/2] mmc: dw_mmc: Don't start command while data busy
From: Addy Ke <hidden>
Date: 2015-02-09 07:28:06
Also in:
linux-devicetree, 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 | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index b0b57e3..b40080d 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c@@ -1007,6 +1007,13 @@ static void __dw_mci_start_request(struct dw_mci *host, mci_writel(host, BLKSIZ, data->blksz); } + /* + * We should wait for data busy here in non-volt-switch state. + * This may happend when sdio sends CMD53. + */ + if (host->state != STATE_WAITING_CMD11_DONE) + dw_mci_wait_busy(slot); + cmdflags = dw_mci_prepare_command(slot->mmc, cmd); /* this is the first command, send the initialization clock */
--
1.8.3.2