On Mon, Jul 20, 2020 at 02:16:45PM +0800, chenxiang (M) wrote:
> Hi Vaibhav,
>
> 在 2020/7/17 14:34, Vaibhav Gupta 写道:
> > With legacy PM, drivers themselves were responsible for managing the
> > device's power states and takes care of register states.
> >
> > After upgrading to the generic structure, PCI core will take care of
> > required tasks and drivers should do only device-specific operations.
> >
> > The driver was calling pci_save/restore_state(), pci_choose_state(),
> > pci_enable/disable_device() and pci_set_power_state() which is no more
> > needed.
> >
> > Compile-tested only.
> >
> > Signed-off-by: Vaibhav Gupta <vaibhavgupta40@xxxxxxxxx>
>
> Reviewed-by: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
> Just a small comment, below.
>
> > ---
> > drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 32 ++++++++------------------
> > 1 file changed, 10 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> > index 55e2321a65bc..45605a520bc8 100644
> > --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> > +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> > @@ -3374,13 +3374,13 @@ enum {
> > hip08,
> > };
> > -static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
> > +static int __maybe_unused hisi_sas_v3_suspend(struct device *dev_d)
> > {
> > + struct pci_dev *pdev = to_pci_dev(dev_d);
> > struct sas_ha_struct *sha = pci_get_drvdata(pdev);
> > struct hisi_hba *hisi_hba = sha->lldd_ha;
> > struct device *dev = hisi_hba->dev;
> > struct Scsi_Host *shost = hisi_hba->shost;
> > - pci_power_t device_state;
> > int rc;
> > if (!pdev->pm_cap) {
> > @@ -3406,21 +3406,15 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
> > hisi_sas_init_mem(hisi_hba);
> > - device_state = pci_choose_state(pdev, state);
> > - dev_warn(dev, "entering operating state [D%d]\n",
> > - device_state);
>
> Please retain above print to keep consistence with the print in function
> hisi_sas_v3_resume().
>
Okay, Thanks for the review :)
This is will be fixed in v2 patch-series along with other changes.
-- Vaibhav Gupta
> > - pci_save_state(pdev);
> > - pci_disable_device(pdev);
> > - pci_set_power_state(pdev, device_state);
> > -
> > hisi_sas_release_tasks(hisi_hba);
> > sas_suspend_ha(sha);
> > return 0;
> > }
> > -static int hisi_sas_v3_resume(struct pci_dev *pdev)
> > +static int __maybe_unused hisi_sas_v3_resume(struct device *dev_d)
> > {
> > + struct pci_dev *pdev = to_pci_dev(dev_d);
> > struct sas_ha_struct *sha = pci_get_drvdata(pdev);
> > struct hisi_hba *hisi_hba = sha->lldd_ha;
> > struct Scsi_Host *shost = hisi_hba->shost;
> > @@ -3430,16 +3424,8 @@ static int hisi_sas_v3_resume(struct pci_dev *pdev)
> > dev_warn(dev, "resuming from operating state [D%d]\n",
> > device_state);
> > - pci_set_power_state(pdev, PCI_D0);
> > - pci_enable_wake(pdev, PCI_D0, 0);
> > - pci_restore_state(pdev);
> > - rc = pci_enable_device(pdev);
> > - if (rc) {
> > - dev_err(dev, "enable device failed during resume (%d)\n", rc);
> > - return rc;
> > - }
> > + device_wakeup_disable(dev_d);
> > - pci_set_master(pdev);
> > scsi_unblock_requests(shost);
> > clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
> > @@ -3447,7 +3433,6 @@ static int hisi_sas_v3_resume(struct pci_dev *pdev)
> > rc = hw_init_v3_hw(hisi_hba);
> > if (rc) {
> > scsi_remove_host(shost);
> > - pci_disable_device(pdev);
> > return rc;
> > }
> > hisi_hba->hw->phys_init(hisi_hba);
> > @@ -3468,13 +3453,16 @@ static const struct pci_error_handlers hisi_sas_err_handler = {
> > .reset_done = hisi_sas_reset_done_v3_hw,
> > };
> > +static SIMPLE_DEV_PM_OPS(hisi_sas_v3_pm_ops,
> > + hisi_sas_v3_suspend,
> > + hisi_sas_v3_resume);
> > +
> > static struct pci_driver sas_v3_pci_driver = {
> > .name = DRV_NAME,
> > .id_table = sas_v3_pci_table,
> > .probe = hisi_sas_v3_probe,
> > .remove = hisi_sas_v3_remove,
> > - .suspend = hisi_sas_v3_suspend,
> > - .resume = hisi_sas_v3_resume,
> > + .driver.pm = &hisi_sas_v3_pm_ops,
> > .err_handler = &hisi_sas_err_handler,
> > };
>
>
