[PATCH 10/23] mmc: core: disable auto retune during card detection process

Dong Aisheng aisheng.dong at nxp.com
Fri Apr 15 10:29:34 PDT 2016

During card detection process, mmc core may sends commands
to detect if card is still exist in mmc_rescan for removable
card which may trigger mmc retuning process after a bit time
of runtime pm suspend.
Obviously this retuning process is meaningless for card remove
case, so we disable mmc_retune in mmc_detect_change() for it.
For card insert case, the mmc_retune will be enabled normally
in its card initialization process later in mmc_execute_tuning().
So disable it at first has no side effection.

CC: stable <stable at vger.kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong at nxp.com>
 drivers/mmc/core/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 52bfaf0..76d0802 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1888,6 +1888,7 @@ static void _mmc_detect_change(struct mmc_host *host, unsigned long delay,
 		pm_wakeup_event(mmc_dev(host), 5000);
 	host->detect_change = 1;
+	mmc_retune_disable(host);
 	mmc_schedule_delayed_work(&host->detect, delay);

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