From: Adrian Hunter adrian.hunter@intel.com
[ Upstream commit af423534d2de86cd0db729a5ac41f056ca8717de ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/ufs/ufshcd-pci.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c index 3b19de3ae9a30..e4ba2445ff56f 100644 --- a/drivers/scsi/ufs/ufshcd-pci.c +++ b/drivers/scsi/ufs/ufshcd-pci.c @@ -96,6 +96,30 @@ 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 @@ -190,8 +214,14 @@ 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)