1 files changed, 59 insertions, 9 deletions

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 6a3fe88033bd..ce13df598385 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -33,6 +33,42 @@
 
 static DEFINE_IDA(mmc_host_ida);
 
+#ifdef CONFIG_PM_SLEEP
+static int mmc_host_class_prepare(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	/*
+	 * It's safe to access the bus_ops pointer, as both userspace and the
+	 * workqueue for detecting cards are frozen at this point.
+	 */
+	if (!host->bus_ops)
+		return 0;
+
+	/* Validate conditions for system suspend. */
+	if (host->bus_ops->pre_suspend)
+		return host->bus_ops->pre_suspend(host);
+
+	return 0;
+}
+
+static void mmc_host_class_complete(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	_mmc_detect_change(host, 0, false);
+}
+
+static const struct dev_pm_ops mmc_host_class_dev_pm_ops = {
+	.prepare = mmc_host_class_prepare,
+	.complete = mmc_host_class_complete,
+};
+
+#define MMC_HOST_CLASS_DEV_PM_OPS (&mmc_host_class_dev_pm_ops)
+#else
+#define MMC_HOST_CLASS_DEV_PM_OPS NULL
+#endif
+
 static void mmc_host_classdev_release(struct device *dev)
 {
 	struct mmc_host *host = cls_dev_to_mmc_host(dev);
@@ -40,9 +76,19 @@ static void mmc_host_classdev_release(struct device *dev)
 	kfree(host);
 }
 
+static int mmc_host_classdev_shutdown(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	__mmc_stop_host(host);
+	return 0;
+}
+
 static struct class mmc_host_class = {
 	.name		= "mmc_host",
 	.dev_release	= mmc_host_classdev_release,
+	.shutdown_pre	= mmc_host_classdev_shutdown,
+	.pm		= MMC_HOST_CLASS_DEV_PM_OPS,
 };
 
 int mmc_register_host_class(void)
@@ -294,8 +340,6 @@ int mmc_of_parse(struct mmc_host *host)
 	if (device_property_read_bool(dev, "wakeup-source") ||
 	    device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
 		host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
-	if (device_property_read_bool(dev, "pm-ignore-notify"))
-		host->pm_caps |= MMC_PM_IGNORE_PM_NOTIFY;
 	if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
 		host->caps |= MMC_CAP_3_3V_DDR;
 	if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
@@ -461,6 +505,16 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 
 EXPORT_SYMBOL(mmc_alloc_host);
 
+static int mmc_validate_host_caps(struct mmc_host *host)
+{
+	if (host->caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {
+		dev_warn(host->parent, "missing ->enable_sdio_irq() ops\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 /**
  *	mmc_add_host - initialise host hardware
  *	@host: mmc host
@@ -473,8 +527,9 @@ int mmc_add_host(struct mmc_host *host)
 {
 	int err;
 
-	WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
-		!host->ops->enable_sdio_irq);
+	err = mmc_validate_host_caps(host);
+	if (err)
+		return err;
 
 	err = device_add(&host->class_dev);
 	if (err)
@@ -487,9 +542,6 @@ int mmc_add_host(struct mmc_host *host)
 #endif
 
 	mmc_start_host(host);
-	if (!(host->pm_caps& MMC_PM_IGNORE_PM_NOTIFY))
-		mmc_register_pm_notifier(host);
-
 	return 0;
 }
 
@@ -505,8 +557,6 @@ EXPORT_SYMBOL(mmc_add_host);
  */
 void mmc_remove_host(struct mmc_host *host)
 {
-	if (!(host->pm_caps& MMC_PM_IGNORE_PM_NOTIFY))
-		mmc_unregister_pm_notifier(host);
 	mmc_stop_host(host);
 
 #ifdef CONFIG_DEBUG_FS