mmc: core: Push common suspend|resume code into each bus_ops

By moving code from the mmc_suspend|resume_host down into each
.suspend|resume bus_ops callback, we get a more flexible solution.

Some nice side effects are that we get a better understanding of each
bus_ops suspend|resume sequence and the common code don't have to take
care of specific corner cases, especially for the SDIO case.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 3 insertions, 28 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 7a8a42d..da3b907 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2621,9 +2621,6 @@ int mmc_suspend_host(struct mmc_host *host)
 {
 	int err = 0;
 
-	cancel_delayed_work(&host->detect);
-	mmc_flush_scheduled_work();
-
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
 		if (host->bus_ops->suspend)
@@ -2631,9 +2628,6 @@ int mmc_suspend_host(struct mmc_host *host)
 	}
 	mmc_bus_put(host);
 
-	if (!err && !mmc_card_keep_power(host))
-		mmc_power_off(host);
-
 	return err;
 }
 EXPORT_SYMBOL(mmc_suspend_host);
@@ -2644,39 +2638,20 @@ EXPORT_SYMBOL(mmc_suspend_host);
  */
 int mmc_resume_host(struct mmc_host *host)
 {
-	int err = 0;
+	int err;
 
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
-		if (!mmc_card_keep_power(host)) {
-			mmc_power_up(host);
-			mmc_select_voltage(host, host->ocr);
-			/*
-			 * Tell runtime PM core we just powered up the card,
-			 * since it still believes the card is powered off.
-			 * Note that currently runtime PM is only enabled
-			 * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
-			 */
-			if (mmc_card_sdio(host->card) &&
-			    (host->caps & MMC_CAP_POWER_OFF_CARD)) {
-				pm_runtime_disable(&host->card->dev);
-				pm_runtime_set_active(&host->card->dev);
-				pm_runtime_enable(&host->card->dev);
-			}
-		}
 		BUG_ON(!host->bus_ops->resume);
 		err = host->bus_ops->resume(host);
-		if (err) {
+		if (err)
 			pr_warning("%s: error %d during resume "
 					    "(card was removed?)\n",
 					    mmc_hostname(host), err);
-			err = 0;
-		}
 	}
-	host->pm_flags &= ~MMC_PM_KEEP_POWER;
 	mmc_bus_put(host);
 
-	return err;
+	return 0;
 }
 EXPORT_SYMBOL(mmc_resume_host);