Revert "ata: ahci_platform: allow disabling of hotplug to save power"

This reverts commit aece27a2f01be4bb7683790f69cd1bed3a0929a2.

Causes boot failure on some devices.

 http://lore.kernel.org/r/CA+G9fYuKW_jCFZPqG4tz=QY9ROfHO38KiCp9XTA+KaDOFVtcqQ@mail.gmail.com

Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/ahci_platform.c

@@ -68,13 +68,8 @@ disable_resources:
 	return rc;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static const struct dev_pm_ops ahci_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(ahci_platform_suspend, ahci_platform_resume)
-	SET_RUNTIME_PM_OPS(ahci_platform_runtime_suspend,
-			ahci_platform_runtime_resume, NULL)
-};
-#endif
+static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
+			 ahci_platform_resume);
 
 static const struct of_device_id ahci_of_match[] = {
 	{ .compatible = "generic-ahci", },
@@ -103,9 +98,7 @@ static struct platform_driver ahci_driver = {
 		.name = DRV_NAME,
 		.of_match_table = ahci_of_match,
 		.acpi_match_table = ahci_acpi_match,
-#ifdef CONFIG_PM_SLEEP
 		.pm = &ahci_pm_ops,
-#endif
 	},
 };
 module_platform_driver(ahci_driver);

drivers/ata/libahci_platform.c

@@ -257,7 +257,7 @@ static void ahci_platform_put_resources(struct device *dev, void *res)
 	int c;
 
 	if (hpriv->got_runtime_pm) {
-		pm_runtime_allow(dev);
+		pm_runtime_put_sync(dev);
 		pm_runtime_disable(dev);
 	}
 
@@ -477,10 +477,8 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 		if (rc == -EPROBE_DEFER)
 			goto err_out;
 	}
-
-	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
-	pm_runtime_forbid(dev);
+	pm_runtime_get_sync(dev);
 	hpriv->got_runtime_pm = true;
 
 	devres_remove_group(dev, NULL);
@@ -709,21 +707,6 @@ int ahci_platform_resume_host(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
 
-static int _ahci_platform_suspend(struct device *dev)
-{
-	struct ata_host *host = dev_get_drvdata(dev);
-	struct ahci_host_priv *hpriv = host->private_data;
-	int rc;
-
-	rc = ahci_platform_suspend_host(dev);
-	if (rc)
-		return rc;
-
-	ahci_platform_disable_resources(hpriv);
-
-	return 0;
-}
-
 /**
  * ahci_platform_suspend - Suspend an ahci-platform device
  * @dev: the platform device to suspend
@@ -735,45 +718,20 @@ static int _ahci_platform_suspend(struct device *dev)
  * 0 on success otherwise a negative error code
  */
 int ahci_platform_suspend(struct device *dev)
-{
-	return _ahci_platform_suspend(dev);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_suspend);
-
-/**
- * ahci_platform_runtime_suspend - Runtime suspend an ahci-platform device
- * @dev: the platform device to suspend
- *
- * This function suspends the host associated with the device, followed by
- * disabling all the resources of the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_runtime_suspend(struct device *dev)
-{
-	return _ahci_platform_suspend(dev);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_runtime_suspend);
-
-static int _ahci_platform_resume(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;
 
-	rc = ahci_platform_enable_resources(hpriv);
+	rc = ahci_platform_suspend_host(dev);
 	if (rc)
 		return rc;
 
-	rc = ahci_platform_resume_host(dev);
-	if (rc) {
-		ahci_platform_disable_resources(hpriv);
-		return rc;
-	}
+	ahci_platform_disable_resources(hpriv);
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ahci_platform_suspend);
 
 /**
  * ahci_platform_resume - Resume an ahci-platform device
@@ -787,37 +745,31 @@ static int _ahci_platform_resume(struct device *dev)
  */
 int ahci_platform_resume(struct device *dev)
 {
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;
 
-	rc = _ahci_platform_resume(dev);
+	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
 		return rc;
 
+	rc = ahci_platform_resume_host(dev);
+	if (rc)
+		goto disable_resources;
+
 	/* We resumed so update PM runtime state */
 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
 
 	return 0;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_resume);
 
-/**
- * ahci_platform_runtime_resume - Runtime resume an ahci-platform device
- * @dev: the platform device to resume
- *
- * This function enables all the resources of the device followed by
- * resuming the host associated with the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_runtime_resume(struct device *dev)
-{
-	return _ahci_platform_resume(dev);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_runtime_resume);
+disable_resources:
+	ahci_platform_disable_resources(hpriv);
 
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_resume);
 #endif
 
 MODULE_DESCRIPTION("AHCI SATA platform library");

include/linux/ahci_platform.h

@@ -42,7 +42,5 @@ int ahci_platform_suspend_host(struct device *dev);
 int ahci_platform_resume_host(struct device *dev);
 int ahci_platform_suspend(struct device *dev);
 int ahci_platform_resume(struct device *dev);
-int ahci_platform_runtime_suspend(struct device *dev);
-int ahci_platform_runtime_resume(struct device *dev);
 
 #endif /* _AHCI_PLATFORM_H */