mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 10:44:14 +08:00
db5bd1e0b5
This patch (as1397b) converts the SCSI midlayer to use the new PM callbacks (struct dev_pm_ops). A new source file, scsi_pm.c, is created to hold the new callback routines, and the existing suspend/resume code is moved there. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
|
|
* scsi_pm.c Copyright (C) 2010 Alan Stern
|
|
*
|
|
* SCSI dynamic Power Management
|
|
* Initial version: Alan Stern <stern@rowland.harvard.edu>
|
|
*/
|
|
|
|
#include <linux/pm_runtime.h>
|
|
|
|
#include <scsi/scsi.h>
|
|
#include <scsi/scsi_device.h>
|
|
#include <scsi/scsi_driver.h>
|
|
#include <scsi/scsi_host.h>
|
|
|
|
#include "scsi_priv.h"
|
|
|
|
static int scsi_dev_type_suspend(struct device *dev, pm_message_t msg)
|
|
{
|
|
struct device_driver *drv;
|
|
int err;
|
|
|
|
err = scsi_device_quiesce(to_scsi_device(dev));
|
|
if (err == 0) {
|
|
drv = dev->driver;
|
|
if (drv && drv->suspend)
|
|
err = drv->suspend(dev, msg);
|
|
}
|
|
dev_dbg(dev, "scsi suspend: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
static int scsi_dev_type_resume(struct device *dev)
|
|
{
|
|
struct device_driver *drv;
|
|
int err = 0;
|
|
|
|
drv = dev->driver;
|
|
if (drv && drv->resume)
|
|
err = drv->resume(dev);
|
|
scsi_device_resume(to_scsi_device(dev));
|
|
dev_dbg(dev, "scsi resume: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int scsi_bus_suspend_common(struct device *dev, pm_message_t msg)
|
|
{
|
|
int err = 0;
|
|
|
|
if (scsi_is_sdev_device(dev))
|
|
err = scsi_dev_type_suspend(dev, msg);
|
|
return err;
|
|
}
|
|
|
|
static int scsi_bus_resume_common(struct device *dev)
|
|
{
|
|
int err = 0;
|
|
|
|
if (scsi_is_sdev_device(dev))
|
|
err = scsi_dev_type_resume(dev);
|
|
return err;
|
|
}
|
|
|
|
static int scsi_bus_suspend(struct device *dev)
|
|
{
|
|
return scsi_bus_suspend_common(dev, PMSG_SUSPEND);
|
|
}
|
|
|
|
static int scsi_bus_freeze(struct device *dev)
|
|
{
|
|
return scsi_bus_suspend_common(dev, PMSG_FREEZE);
|
|
}
|
|
|
|
static int scsi_bus_poweroff(struct device *dev)
|
|
{
|
|
return scsi_bus_suspend_common(dev, PMSG_HIBERNATE);
|
|
}
|
|
|
|
#else /* CONFIG_PM_SLEEP */
|
|
|
|
#define scsi_bus_resume_common NULL
|
|
#define scsi_bus_suspend NULL
|
|
#define scsi_bus_freeze NULL
|
|
#define scsi_bus_poweroff NULL
|
|
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
const struct dev_pm_ops scsi_bus_pm_ops = {
|
|
.suspend = scsi_bus_suspend,
|
|
.resume = scsi_bus_resume_common,
|
|
.freeze = scsi_bus_freeze,
|
|
.thaw = scsi_bus_resume_common,
|
|
.poweroff = scsi_bus_poweroff,
|
|
.restore = scsi_bus_resume_common,
|
|
};
|