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scsi: ufs-pci: Ensure UFS device is in PowerDown mode for suspend-to-disk ->poweroff() 

The expectation for suspend-to-disk is that devices will be powered-off, so
the UFS device should be put in PowerDown mode. If spm_lvl is not 5, then
that will not happen. Change the pm callbacks to force spm_lvl 5 for
suspend-to-disk poweroff.

Link: https://lore.kernel.org/r/20201207083120.26732-3-adrian.hunter@intel.com
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Adrian Hunter 2020-12-07 10:31:18 +02:00 committed by Martin K. Petersen
parent c763729a10
commit af423534d2
1 changed files with 32 additions and 2 deletions
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34
drivers/scsi/ufs/ufshcd-pci.c
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@ -227,6 +227,30 @@ static int ufshcd_pci_resume(struct device *dev)
{
return ufshcd_system_resume(dev_get_drvdata(dev));
}
/**
* ufshcd_pci_poweroff - suspend-to-disk poweroff function
* @dev: pointer to PCI device handle
*
* Returns 0 if successful
* Returns non-zero otherwise
*/
static int ufshcd_pci_poweroff(struct device *dev)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
int spm_lvl = hba->spm_lvl;
int ret;
/*
* For poweroff we need to set the UFS device to PowerDown mode.
* Force spm_lvl to ensure that.
*/
hba->spm_lvl = 5;
ret = ufshcd_system_suspend(hba);
hba->spm_lvl = spm_lvl;
return ret;
}
#endif /* !CONFIG_PM_SLEEP */
#ifdef CONFIG_PM
@ -322,8 +346,14 @@ ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
}
static const struct dev_pm_ops ufshcd_pci_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend,
ufshcd_pci_resume)
#ifdef CONFIG_PM_SLEEP
.suspend = ufshcd_pci_suspend,
.resume = ufshcd_pci_resume,
.freeze = ufshcd_pci_suspend,
.thaw = ufshcd_pci_resume,
.poweroff = ufshcd_pci_poweroff,
.restore = ufshcd_pci_resume,
#endif
SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
ufshcd_pci_runtime_resume,
ufshcd_pci_runtime_idle)