From cbac2e52012519d9ef39dedcc50b75c1b05ab8b7 Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Mon, 10 Jun 2013 17:03:40 +0200
Subject: [PATCH] mmc: core: Handle card shutdown from mmc_bus

Considering shutdown of the card, the responsibility to initate this
sequence shall be driven from the mmc_bus.

This patch enables the mmc_bus to handle this sequence properly. A new
.shutdown callback is added in the mmc_driver struct which is used to
shutdown the blk device.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/card/block.c    | 15 +++++++++++++--
 drivers/mmc/card/mmc_test.c |  5 +++++
 drivers/mmc/core/bus.c      |  9 +++++++++
 include/linux/mmc/card.h    |  1 +
 4 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index a383849b32a9..721e74e36171 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2454,8 +2454,7 @@ static void mmc_blk_remove(struct mmc_card *card)
 #endif
 }
 
-#ifdef CONFIG_PM
-static int mmc_blk_suspend(struct mmc_card *card)
+static int _mmc_blk_suspend(struct mmc_card *card)
 {
 	struct mmc_blk_data *part_md;
 	struct mmc_blk_data *md = mmc_get_drvdata(card);
@@ -2470,6 +2469,17 @@ static int mmc_blk_suspend(struct mmc_card *card)
 	return 0;
 }
 
+static void mmc_blk_shutdown(struct mmc_card *card)
+{
+	_mmc_blk_suspend(card);
+}
+
+#ifdef CONFIG_PM
+static int mmc_blk_suspend(struct mmc_card *card)
+{
+	return _mmc_blk_suspend(card);
+}
+
 static int mmc_blk_resume(struct mmc_card *card)
 {
 	struct mmc_blk_data *part_md;
@@ -2502,6 +2512,7 @@ static struct mmc_driver mmc_driver = {
 	.remove		= mmc_blk_remove,
 	.suspend	= mmc_blk_suspend,
 	.resume		= mmc_blk_resume,
+	.shutdown	= mmc_blk_shutdown,
 };
 
 static int __init mmc_blk_init(void)
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 759714ed6bee..a69df5216274 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -3025,12 +3025,17 @@ static void mmc_test_remove(struct mmc_card *card)
 	mmc_test_free_dbgfs_file(card);
 }
 
+static void mmc_test_shutdown(struct mmc_card *card)
+{
+}
+
 static struct mmc_driver mmc_driver = {
 	.drv		= {
 		.name	= "mmc_test",
 	},
 	.probe		= mmc_test_probe,
 	.remove		= mmc_test_remove,
+	.shutdown	= mmc_test_shutdown,
 };
 
 static int __init mmc_test_init(void)
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index a5bcf82ae0d2..93663cc3bc3f 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -122,6 +122,14 @@ static int mmc_bus_remove(struct device *dev)
 	return 0;
 }
 
+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);
+
+	drv->shutdown(card);
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int mmc_bus_suspend(struct device *dev)
 {
@@ -205,6 +213,7 @@ static struct bus_type mmc_bus_type = {
 	.uevent		= mmc_bus_uevent,
 	.probe		= mmc_bus_probe,
 	.remove		= mmc_bus_remove,
+	.shutdown	= mmc_bus_shutdown,
 	.pm		= &mmc_bus_pm_ops,
 };
 
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 6a98f32670b8..842de3e21e70 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -520,6 +520,7 @@ struct mmc_driver {
 	void (*remove)(struct mmc_card *);
 	int (*suspend)(struct mmc_card *);
 	int (*resume)(struct mmc_card *);
+	void (*shutdown)(struct mmc_card *);
 };
 
 extern int mmc_register_driver(struct mmc_driver *);
-- 
2.34.1