mmc: remove MMC bus legacy suspend/resume method

MMC bus is using legacy suspend/resume method, which is not compatible if
runtime pm callbacks are used. In this scenario, MMC bus suspend/resume
callbacks cannot be called when system entering S3. So change to use the
new defined dev_pm_ops for system sleeping mode.

Tested on AM335x Platform. Solves major issue/crash reported at
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg65425.html

Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Tested-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 4232bc4..dabec55 100644 (file)
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1824,7 +1824,7 @@ static void mmc_blk_remove(struct mmc_card *card)
 }
 
 #ifdef CONFIG_PM
-static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state)
+static int mmc_blk_suspend(struct mmc_card *card)
 {
        struct mmc_blk_data *part_md;
        struct mmc_blk_data *md = mmc_get_drvdata(card);

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 3f60606..c60cee9 100644 (file)
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -122,14 +122,14 @@ static int mmc_bus_remove(struct device *dev)
        return 0;
 }
 
-static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+static int mmc_bus_suspend(struct device *dev)
 {
        struct mmc_driver *drv = to_mmc_driver(dev->driver);
        struct mmc_card *card = mmc_dev_to_card(dev);
        int ret = 0;
 
        if (dev->driver && drv->suspend)
-               ret = drv->suspend(card, state);
+               ret = drv->suspend(card);
        return ret;
 }
 
@@ -165,20 +165,14 @@ static int mmc_runtime_idle(struct device *dev)
        return pm_runtime_suspend(dev);
 }
 
+#endif /* !CONFIG_PM_RUNTIME */
+
 static const struct dev_pm_ops mmc_bus_pm_ops = {
-       .runtime_suspend        = mmc_runtime_suspend,
-       .runtime_resume         = mmc_runtime_resume,
-       .runtime_idle           = mmc_runtime_idle,
+       SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
+                       mmc_runtime_idle)
+       SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
 };
 
-#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
-
-#else /* !CONFIG_PM_RUNTIME */
-
-#define MMC_PM_OPS_PTR NULL
-
-#endif /* !CONFIG_PM_RUNTIME */
-
 static struct bus_type mmc_bus_type = {
        .name           = "mmc",
        .dev_attrs      = mmc_dev_attrs,
@@ -186,9 +180,7 @@ static struct bus_type mmc_bus_type = {
        .uevent         = mmc_bus_uevent,
        .probe          = mmc_bus_probe,
        .remove         = mmc_bus_remove,
-       .suspend        = mmc_bus_suspend,
-       .resume         = mmc_bus_resume,
-       .pm             = MMC_PM_OPS_PTR,
+       .pm             = &mmc_bus_pm_ops,
 };
 
 int mmc_register_bus(void)

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 01beae7..629b823 100644 (file)
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -481,7 +481,7 @@ struct mmc_driver {
        struct device_driver drv;
        int (*probe)(struct mmc_card *);
        void (*remove)(struct mmc_card *);
-       int (*suspend)(struct mmc_card *, pm_message_t);
+       int (*suspend)(struct mmc_card *);
        int (*resume)(struct mmc_card *);
 };