subscribe linux-ide On Tue, Jun 3, 2014 at 10:05 AM, AYAN KUMAR HALDER <ayankumarh@xxxxxxxxx> wrote: > Hi, > > I am working with Linux hibernation framework on ARM based custom SOC > which has SATA controller on PCI bus. > > I see that when the system resumes from hibernation, the SATA > controller(drivers/ata/ahci.c) on PCI bus fails to come up. My > understanding is that the hibernation calls 'freeze' of all devices. > The SATA controller receives the power state event as PM_EVENT_FREEZE > ( ie pdev->dev.power.power_state.event = PM_EVENT_FREEZE). Thus when > system restores the hibernation image, ahci_pci_device_resume gets > called in which ahci_pci_reset_controller/ahci_pci_init_controller > does not get called. So SATA controller fails to come up. > > Please let me know if my understanding is correct or not. If so, then > in ahci_pci_device_resume() should we change the following > if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) > to > if (pdev->dev.power.power_state.event == PM_EVENT_FREEZE) > > In hibernation , as we power down the system, so I understand that the > sata controller need to be reset and re-initialized for proper > functioning. > > Regards, > Ayan Kumar Halder -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
