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path: root/drivers/scsi/scsi_sysfs.c
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Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c70
1 files changed, 21 insertions, 49 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index c23ab978c3ba..c3f67373a4f8 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/device.h>
+#include <linux/pm_runtime.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
@@ -376,57 +377,13 @@ static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
return 0;
}
-static int scsi_bus_suspend(struct device * dev, pm_message_t state)
-{
- struct device_driver *drv;
- struct scsi_device *sdev;
- int err;
-
- if (dev->type != &scsi_dev_type)
- return 0;
-
- drv = dev->driver;
- sdev = to_scsi_device(dev);
-
- err = scsi_device_quiesce(sdev);
- if (err)
- return err;
-
- if (drv && drv->suspend) {
- err = drv->suspend(dev, state);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-static int scsi_bus_resume(struct device * dev)
-{
- struct device_driver *drv;
- struct scsi_device *sdev;
- int err = 0;
-
- if (dev->type != &scsi_dev_type)
- return 0;
-
- drv = dev->driver;
- sdev = to_scsi_device(dev);
-
- if (drv && drv->resume)
- err = drv->resume(dev);
-
- scsi_device_resume(sdev);
-
- return err;
-}
-
struct bus_type scsi_bus_type = {
.name = "scsi",
.match = scsi_bus_match,
.uevent = scsi_bus_uevent,
- .suspend = scsi_bus_suspend,
- .resume = scsi_bus_resume,
+#ifdef CONFIG_PM_OPS
+ .pm = &scsi_bus_pm_ops,
+#endif
};
EXPORT_SYMBOL_GPL(scsi_bus_type);
@@ -848,8 +805,6 @@ static int scsi_target_add(struct scsi_target *starget)
if (starget->state != STARGET_CREATED)
return 0;
- device_enable_async_suspend(&starget->dev);
-
error = device_add(&starget->dev);
if (error) {
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
@@ -858,6 +813,10 @@ static int scsi_target_add(struct scsi_target *starget)
transport_add_device(&starget->dev);
starget->state = STARGET_RUNNING;
+ pm_runtime_set_active(&starget->dev);
+ pm_runtime_enable(&starget->dev);
+ device_enable_async_suspend(&starget->dev);
+
return 0;
}
@@ -887,7 +846,20 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
return error;
transport_configure_device(&starget->dev);
+
device_enable_async_suspend(&sdev->sdev_gendev);
+ scsi_autopm_get_target(starget);
+ pm_runtime_set_active(&sdev->sdev_gendev);
+ pm_runtime_forbid(&sdev->sdev_gendev);
+ pm_runtime_enable(&sdev->sdev_gendev);
+ scsi_autopm_put_target(starget);
+
+ /* The following call will keep sdev active indefinitely, until
+ * its driver does a corresponding scsi_autopm_pm_device(). Only
+ * drivers supporting autosuspend will do this.
+ */
+ scsi_autopm_get_device(sdev);
+
error = device_add(&sdev->sdev_gendev);
if (error) {
printk(KERN_INFO "error 1\n");