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| author | Lin Ming <ming.m.lin@intel.com> | 2011-12-22 14:50:49 +0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-01-08 19:14:59 -0500 |
| commit | 33574d68ae41ccbc6686cfabd965c685285c58a0 (patch) | |
| tree | 617e26ada8d782869c5e0c0af1f11274a10947a3 /drivers/ata | |
| parent | e90b1e5a6e04c8892007ff8db20ef6d4fbdb5402 (diff) | |
| download | linux-33574d68ae41ccbc6686cfabd965c685285c58a0.tar.gz linux-33574d68ae41ccbc6686cfabd965c685285c58a0.tar.xz linux-33574d68ae41ccbc6686cfabd965c685285c58a0.zip | |
ata: add ata port hibernate callbacks
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-core.c | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index ba1ed9b3acc3..11c9aea4f4f7 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -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, }; |