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Bottomley" , "Martin K. Petersen" , Adaptec OEM Raid Solutions , Hannes Reinecke , Bradley Grove , John Garry , Don Brace , James Smart , Dick Kennedy , Kashyap Desai , Sumit Saxena , Shivasharan S , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , Jack Wang Message-ID: <20200908170058.GG9948@gmail.com> References: <20200720133427.454400-1-vaibhavgupta40@gmail.com> <20200720133427.454400-7-vaibhavgupta40@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200720133427.454400-7-vaibhavgupta40@gmail.com> Cc: linux-scsi@vger.kernel.org, MPT-FusionLinux.pdl@broadcom.com, esc.storagedev@microsemi.com, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, megaraidlinux.pdl@broadcom.com Subject: Re: [Linux-kernel-mentees] [PATCH v2 06/15] scsi: esas2r: use generic power management X-BeenThere: linux-kernel-mentees@lists.linuxfoundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-kernel-mentees-bounces@lists.linuxfoundation.org Sender: "Linux-kernel-mentees" On Mon, Jul 20, 2020 at 07:04:19PM +0530, Vaibhav Gupta wrote: > 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 > --- > drivers/scsi/esas2r/esas2r.h | 5 ++-- > drivers/scsi/esas2r/esas2r_init.c | 48 +++++++++---------------------- > drivers/scsi/esas2r/esas2r_main.c | 3 +- > 3 files changed, 18 insertions(+), 38 deletions(-) > > diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h > index 7f43b95f4e94..6ad3e0871ef0 100644 > --- a/drivers/scsi/esas2r/esas2r.h > +++ b/drivers/scsi/esas2r/esas2r.h > @@ -996,8 +996,9 @@ void esas2r_adapter_tasklet(unsigned long context); > irqreturn_t esas2r_interrupt(int irq, void *dev_id); > irqreturn_t esas2r_msi_interrupt(int irq, void *dev_id); > void esas2r_kickoff_timer(struct esas2r_adapter *a); > -int esas2r_suspend(struct pci_dev *pcid, pm_message_t state); > -int esas2r_resume(struct pci_dev *pcid); > + > +extern const struct dev_pm_ops esas2r_pm_ops; > + > void esas2r_fw_event_off(struct esas2r_adapter *a); > void esas2r_fw_event_on(struct esas2r_adapter *a); > bool esas2r_nvram_write(struct esas2r_adapter *a, struct esas2r_request *rq, > diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c > index eb7d139ffc00..6c5854969791 100644 > --- a/drivers/scsi/esas2r/esas2r_init.c > +++ b/drivers/scsi/esas2r/esas2r_init.c > @@ -640,53 +640,31 @@ void esas2r_kill_adapter(int i) > } > } > > -int esas2r_suspend(struct pci_dev *pdev, pm_message_t state) > +static int __maybe_unused esas2r_suspend(struct device *dev) > { > - struct Scsi_Host *host = pci_get_drvdata(pdev); > - u32 device_state; > + struct Scsi_Host *host = dev_get_drvdata(dev); > struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata; > > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "suspending adapter()"); > + esas2r_log_dev(ESAS2R_LOG_INFO, dev, "suspending adapter()"); > if (!a) > return -ENODEV; > > esas2r_adapter_power_down(a, 1); > - device_state = pci_choose_state(pdev, state); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_save_state() called"); > - pci_save_state(pdev); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_disable_device() called"); > - pci_disable_device(pdev); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_set_power_state() called"); > - pci_set_power_state(pdev, device_state); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "esas2r_suspend(): 0"); > + esas2r_log_dev(ESAS2R_LOG_INFO, dev, "esas2r_suspend(): 0"); > return 0; > } > > -int esas2r_resume(struct pci_dev *pdev) > +static int __maybe_unused esas2r_resume(struct device *dev) > { > - struct Scsi_Host *host = pci_get_drvdata(pdev); > + struct Scsi_Host *host = dev_get_drvdata(dev); > struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata; > - int rez; > + int rez = 0; > > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "resuming adapter()"); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_set_power_state(PCI_D0) " > + esas2r_log_dev(ESAS2R_LOG_INFO, dev, "resuming adapter()"); > + esas2r_log_dev(ESAS2R_LOG_INFO, dev, > + "device_wakeup_disable() " > "called"); > - pci_set_power_state(pdev, PCI_D0); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_enable_wake(PCI_D0, 0) " > - "called"); > - pci_enable_wake(pdev, PCI_D0, 0); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_restore_state() called"); > - pci_restore_state(pdev); > - esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), > - "pci_enable_device() called"); > - rez = pci_enable_device(pdev); > - pci_set_master(pdev); > + device_wakeup_disable(dev); > > if (!a) { > rez = -ENODEV; > @@ -730,11 +708,13 @@ int esas2r_resume(struct pci_dev *pdev) > } > > error_exit: > - esas2r_log_dev(ESAS2R_LOG_CRIT, &(pdev->dev), "esas2r_resume(): %d", > + esas2r_log_dev(ESAS2R_LOG_CRIT, dev, "esas2r_resume(): %d", > rez); > return rez; > } > > +SIMPLE_DEV_PM_OPS(esas2r_pm_ops, esas2r_suspend, esas2r_resume); > + > bool esas2r_set_degraded_mode(struct esas2r_adapter *a, char *error_str) > { > set_bit(AF_DEGRADED_MODE, &a->flags); > diff --git a/drivers/scsi/esas2r/esas2r_main.c b/drivers/scsi/esas2r/esas2r_main.c > index 7b49e2e9fcde..aab3ea580e6b 100644 > --- a/drivers/scsi/esas2r/esas2r_main.c > +++ b/drivers/scsi/esas2r/esas2r_main.c > @@ -346,8 +346,7 @@ static struct pci_driver > .id_table = esas2r_pci_table, > .probe = esas2r_probe, > .remove = esas2r_remove, > - .suspend = esas2r_suspend, > - .resume = esas2r_resume, > + .driver.pm = &esas2r_pm_ops, > }; > > static int esas2r_probe(struct pci_dev *pcid, > -- > 2.27.0 > . _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees