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From: Vaibhav Gupta <vaibhavgupta40@gmail.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Bjorn Helgaas <bjorn@helgaas.com>,
	Vaibhav Gupta <vaibhav.varodek@gmail.com>,
	Adam Radford <aradford@gmail.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Adaptec OEM Raid Solutions <aacraid@microsemi.com>,
	Hannes Reinecke <hare@suse.com>,
	Bradley Grove <linuxdrivers@attotech.com>,
	John Garry <john.garry@huawei.com>,
	Don Brace <don.brace@microsemi.com>,
	James Smart <james.smart@broadcom.com>,
	Dick Kennedy <dick.kennedy@broadcom.com>,
	Kashyap Desai <kashyap.desai@broadcom.com>,
	Sumit Saxena <sumit.saxena@broadcom.com>,
	Shivasharan S <shivasharan.srikanteshwara@broadcom.com>,
	Sathya Prakash <sathya.prakash@broadcom.com>,
	Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
	Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
	Jack Wang <jinpu.wang@cloud.ionos.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 08/15] scsi: mpt3sas_scsih: use generic power management
Date: Tue, 8 Sep 2020 22:33:00 +0530	[thread overview]
Message-ID: <20200908170300.GI9948@gmail.com> (raw)
In-Reply-To: <20200720133427.454400-9-vaibhavgupta40@gmail.com>

On Mon, Jul 20, 2020 at 07:04:21PM +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 <vaibhavgupta40@gmail.com>
> ---
>  drivers/scsi/mpt3sas/mpt3sas_scsih.c | 36 +++++++++++-----------------
>  1 file changed, 14 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> index 08fc4b381056..f3c6e68b2921 100644
> --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> @@ -10829,44 +10829,40 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  	return rv;
>  }
>  
> -#ifdef CONFIG_PM
>  /**
>   * scsih_suspend - power management suspend main entry point
> - * @pdev: PCI device struct
> - * @state: PM state change to (usually PCI_D3)
> + * @dev: Device struct
>   *
>   * Return: 0 success, anything else error.
>   */
> -static int
> -scsih_suspend(struct pci_dev *pdev, pm_message_t state)
> +static int __maybe_unused
> +scsih_suspend(struct device *dev)
>  {
> +	struct pci_dev *pdev = to_pci_dev(dev);
>  	struct Scsi_Host *shost = pci_get_drvdata(pdev);
>  	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
> -	pci_power_t device_state;
>  
>  	mpt3sas_base_stop_watchdog(ioc);
>  	flush_scheduled_work();
>  	scsi_block_requests(shost);
>  	_scsih_nvme_shutdown(ioc);
> -	device_state = pci_choose_state(pdev, state);
> -	ioc_info(ioc, "pdev=0x%p, slot=%s, entering operating state [D%d]\n",
> -		 pdev, pci_name(pdev), device_state);
> +	ioc_info(ioc, "pdev=0x%p, slot=%s, entering suspended state\n",
> +		 pdev, pci_name(pdev));
>  
> -	pci_save_state(pdev);
>  	mpt3sas_base_free_resources(ioc);
> -	pci_set_power_state(pdev, device_state);
>  	return 0;
>  }
>  
>  /**
>   * scsih_resume - power management resume main entry point
> - * @pdev: PCI device struct
> + * @dev: Device struct
>   *
>   * Return: 0 success, anything else error.
>   */
> -static int
> -scsih_resume(struct pci_dev *pdev)
> +static int __maybe_unused
> +scsih_resume(struct device *dev)
>  {
> +	struct pci_dev *pdev = to_pci_dev(dev);
>  	struct Scsi_Host *shost = pci_get_drvdata(pdev);
>  	struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
>  	pci_power_t device_state = pdev->current_state;
> @@ -10875,9 +10871,7 @@ scsih_resume(struct pci_dev *pdev)
>  	ioc_info(ioc, "pdev=0x%p, slot=%s, previous operating state [D%d]\n",
>  		 pdev, pci_name(pdev), device_state);
>  
> -	pci_set_power_state(pdev, PCI_D0);
> -	pci_enable_wake(pdev, PCI_D0, 0);
> -	pci_restore_state(pdev);
> +	device_wakeup_disable(dev);
>  	ioc->pdev = pdev;
>  	r = mpt3sas_base_map_resources(ioc);
>  	if (r)
> @@ -10888,7 +10882,6 @@ scsih_resume(struct pci_dev *pdev)
>  	mpt3sas_base_start_watchdog(ioc);
>  	return 0;
>  }
> -#endif /* CONFIG_PM */
>  
>  /**
>   * scsih_pci_error_detected - Called when a PCI error is detected.
> @@ -11162,6 +11155,8 @@ static struct pci_error_handlers _mpt3sas_err_handler = {
>  	.resume		= scsih_pci_resume,
>  };
>  
> +static SIMPLE_DEV_PM_OPS(scsih_pm_ops, scsih_suspend, scsih_resume);
> +
>  static struct pci_driver mpt3sas_driver = {
>  	.name		= MPT3SAS_DRIVER_NAME,
>  	.id_table	= mpt3sas_pci_table,
> @@ -11169,10 +11164,7 @@ static struct pci_driver mpt3sas_driver = {
>  	.remove		= scsih_remove,
>  	.shutdown	= scsih_shutdown,
>  	.err_handler	= &_mpt3sas_err_handler,
> -#ifdef CONFIG_PM
> -	.suspend	= scsih_suspend,
> -	.resume		= scsih_resume,
> -#endif
> +	.driver.pm	= &scsih_pm_ops,
>  };
>  
>  /**
> -- 
> 2.27.0
> 
.
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  reply	other threads:[~2020-09-08 17:05 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-20 13:34 [Linux-kernel-mentees] [PATCH v2 00/15] scsi: " Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 01/15] scsi: megaraid_sas: " Vaibhav Gupta
2020-09-08 16:57   ` Vaibhav Gupta
2020-09-08 17:32   ` Bjorn Helgaas
2020-09-09 10:03     ` Vaibhav Gupta
2020-09-09 13:23       ` Bjorn Helgaas
2020-09-09 15:20         ` Vaibhav Gupta
2020-09-09 16:21           ` Bjorn Helgaas
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 02/15] scsi: aacraid: " Vaibhav Gupta
2020-07-23  6:58   ` Balsundar.P--- via Linux-kernel-mentees
2020-09-08 16:58   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 03/15] scsi: aic7xxx: " Vaibhav Gupta
2020-09-08 16:59   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 04/15] scsi: aic79xx: " Vaibhav Gupta
2020-09-08 16:59   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 05/15] scsi: arcmsr: " Vaibhav Gupta
2020-09-08 17:00   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 06/15] scsi: esas2r: " Vaibhav Gupta
2020-09-08 17:01   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 07/15] scsi: hisi_sas_v3_hw: " Vaibhav Gupta
2020-07-21  1:36   ` chenxiang (M)
2020-09-08 17:02   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 08/15] scsi: mpt3sas_scsih: " Vaibhav Gupta
2020-09-08 17:03   ` Vaibhav Gupta [this message]
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 09/15] scsi: lpfc: " Vaibhav Gupta
2020-09-08 17:03   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 10/15] scsi: pm_8001: " Vaibhav Gupta
2020-07-23  7:02   ` Jinpu Wang
2020-09-08 17:04   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 11/15] scsi: hpsa: " Vaibhav Gupta
2020-07-20 22:23   ` Don.Brace--- via Linux-kernel-mentees
2020-09-08 17:05   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 12/15] scsi: 3w-9xxx: " Vaibhav Gupta
2020-09-08 17:05   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 13/15] scsi: 3w-sas: " Vaibhav Gupta
2020-09-08 17:06   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 14/15] scsi: mvumi: " Vaibhav Gupta
2020-09-08 17:07   ` Vaibhav Gupta
2020-07-20 13:34 ` [Linux-kernel-mentees] [PATCH v2 15/15] scsi: pmcraid: " Vaibhav Gupta
2020-09-08 17:08   ` Vaibhav Gupta
2020-08-17  8:16 ` [Linux-kernel-mentees] [PATCH v2 00/15] scsi: " Vaibhav Gupta
2020-09-08 16:54 ` Vaibhav Gupta

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