[PATCH V5 04/13] mmc: core: Turn off CQE before sending commands

Adrian Hunter
2017-08-10T12:15:02Z

CQE needs to be off for the host controller to accept non-CQ commands. Turn
off the CQE before sending commands, and ensure it is off in any reset or
power management paths, or re-tuning.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/core/core.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 6177eb09bf1b..29544aa2824a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -260,6 +260,9 @@ static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)

trace_mmc_request_start(host, mrq);

+ if (host->cqe_on)
+ host->cqe_ops->cqe_off(host);
+
host->ops->request(host, mrq);
}

@@ -979,6 +982,9 @@ int mmc_execute_tuning(struct mmc_card *card)
if (!host->ops->execute_tuning)
return 0;

+ if (host->cqe_on)
+ host->cqe_ops->cqe_off(host);
+
if (mmc_card_mmc(card))
opcode = MMC_SEND_TUNING_BLOCK_HS200;
else
@@ -1018,6 +1024,9 @@ void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
*/
void mmc_set_initial_state(struct mmc_host *host)
{
+ if (host->cqe_on)
+ host->cqe_ops->cqe_off(host);
+
mmc_retune_disable(host);

if (mmc_host_is_spi(host))
--
1.9.1