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ata: add ata port hibernate callbacks 

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Lin Ming 2011-12-22 14:50:49 +08:00 committed by Jeff Garzik
parent e90b1e5a6e
commit 33574d68ae
1 changed files with 36 additions and 4 deletions
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40
drivers/ata/libata-core.c
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@ -5281,12 +5281,24 @@ static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
#define to_ata_port(d) container_of(d, struct ata_port, tdev)
static int ata_port_suspend_common(struct device *dev)
static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
{
struct ata_port *ap = to_ata_port(dev);
unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
rc = ata_port_request_pm(ap, PMSG_SUSPEND, 0, ATA_EHI_QUIET, 1);
/*
* On some hardware, device fails to respond after spun down
* for suspend. As the device won't be used before being
* resumed, we don't need to touch the device. Ask EH to skip
* the usual stuff and proceed directly to suspend.
*
* http://thread.gmane.org/gmane.linux.ide/46764
*/
if (mesg.event == PM_EVENT_SUSPEND)
ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
return rc;
}
@ -5295,7 +5307,23 @@ static int ata_port_suspend(struct device *dev)
if (pm_runtime_suspended(dev))
return 0;
return ata_port_suspend_common(dev);
return ata_port_suspend_common(dev, PMSG_SUSPEND);
}
static int ata_port_do_freeze(struct device *dev)
{
if (pm_runtime_suspended(dev))
pm_runtime_resume(dev);
return ata_port_suspend_common(dev, PMSG_FREEZE);
}
static int ata_port_poweroff(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return ata_port_suspend_common(dev, PMSG_HIBERNATE);
}
static int ata_port_resume_common(struct device *dev)
@ -5330,8 +5358,12 @@ static int ata_port_runtime_idle(struct device *dev)
static const struct dev_pm_ops ata_port_pm_ops = {
.suspend = ata_port_suspend,
.resume = ata_port_resume,
.freeze = ata_port_do_freeze,
.thaw = ata_port_resume,
.poweroff = ata_port_poweroff,
.restore = ata_port_resume,
.runtime_suspend = ata_port_suspend_common,
.runtime_suspend = ata_port_suspend,
.runtime_resume = ata_port_resume_common,
.runtime_idle = ata_port_runtime_idle,
};