mmc: core: Extend shutdown sequence to handle bus operations

By adding an optional .shutdown callback to the bus_ops struct we
provide the possibility to let each bus type handle it's shutdown
requirements.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 219bf4b1d97e..4c0decfffb53 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -126,8 +126,17 @@ static void mmc_bus_shutdown(struct device *dev)
 {
         struct mmc_driver *drv = to_mmc_driver(dev->driver);
         struct mmc_card *card = mmc_dev_to_card(dev);
+        struct mmc_host *host = card->host;
+        int ret;
 
         drv->shutdown(card);
+
+        if (host->bus_ops->shutdown) {
+                ret = host->bus_ops->shutdown(host);
+                if (ret)
+                        pr_warn("%s: error %d during shutdown\n",
+                                mmc_hostname(host), ret);
+        }
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 79f37cfc373b..5345d156493e 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -26,6 +26,7 @@ struct mmc_bus_ops {
         int (*power_save)(struct mmc_host *);
         int (*power_restore)(struct mmc_host *);
         int (*alive)(struct mmc_host *);
+        int (*shutdown)(struct mmc_host *);
 };
 
 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);