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From: "Don.Brace--- via Linux-kernel-mentees" <linux-kernel-mentees@lists.linuxfoundation.org>
To: <vaibhavgupta40@gmail.com>, <helgaas@kernel.org>,
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Cc: linux-scsi@vger.kernel.org, MPT-FusionLinux.pdl@broadcom.com,
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Subject: Re: [Linux-kernel-mentees] [PATCH v3 19/28] scsi: hpsa: use generic power management
Date: Tue, 27 Oct 2020 16:16:55 +0000	[thread overview]
Message-ID: <SN6PR11MB2848B4C4D2899B8DC71E049CE1160@SN6PR11MB2848.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20201001122511.1075420-20-vaibhavgupta40@gmail.com>

-----Original Message-----
From: Vaibhav Gupta [mailto:vaibhavgupta40@gmail.com] 
Sent: Thursday, October 1, 2020 7:25 AM
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: Vaibhav Gupta <vaibhavgupta40@gmail.com>; Shuah Khan <skhan@linuxfoundation.org>; linux-kernel@vger.kernel.org; linux-kernel-mentees@lists.linuxfoundation.org; linux-scsi@vger.kernel.org; esc.storagedev@microsemi.com; megaraidlinux.pdl@broadcom.com; MPT-FusionLinux.pdl@broadcom.com
Subject: [PATCH v3 19/28] scsi: hpsa: use generic power management

EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe

Drivers should do only device-specific jobs. But in general, drivers using legacy PCI PM framework for .suspend()/.resume() have to manage many PCI PM-related tasks themselves which can be done by PCI Core itself. This brings extra load on the driver and it directly calls PCI helper functions to handle them.

Switch to the new generic framework by updating function signatures and define a "struct dev_pm_ops" variable to bind PM callbacks. Also, remove unnecessary calls to the PCI Helper functions along with the legacy .suspend & .resume bindings.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>

Acked-by: Don Brace <don.brace@microchip.com>

---
 drivers/scsi/hpsa.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 81d0414e2117..70bdd6fe91ee 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -9070,25 +9070,27 @@ static void hpsa_remove_one(struct pci_dev *pdev)
        hpda_free_ctlr_info(h);                         /* init_one 1 */
 }

-static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
-       __attribute__((unused)) pm_message_t state)
+static int __maybe_unused hpsa_suspend(
+       __attribute__((unused)) struct device *dev)
 {
        return -ENOSYS;
 }

-static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
+static int __maybe_unused hpsa_resume
+       (__attribute__((unused)) struct device *dev)
 {
        return -ENOSYS;
 }

+static SIMPLE_DEV_PM_OPS(hpsa_pm_ops, hpsa_suspend, hpsa_resume);
+
 static struct pci_driver hpsa_pci_driver = {
        .name = HPSA,
        .probe = hpsa_init_one,
        .remove = hpsa_remove_one,
        .id_table = hpsa_pci_device_id, /* id_table */
        .shutdown = hpsa_shutdown,
-       .suspend = hpsa_suspend,
-       .resume = hpsa_resume,
+       .driver.pm = &hpsa_pm_ops,
 };

 /* Fill in bucket_map[], given nsgs (the max number of
--
2.28.0

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  reply	other threads:[~2020-10-27 16:17 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-01 12:24 [Linux-kernel-mentees] [PATCH v3 00/28] scsi: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 01/28] scsi: megaraid_sas: Drop PCI wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 02/28] scsi: megaraid_sas: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 03/28] scsi: megaraid_sas: update function description Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 04/28] scsi: aacraid: Drop pci_enable_wake() from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 05/28] scsi: aacraid: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 06/28] scsi: aic7xxx: " Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 07/28] scsi: aic79xx: " Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 08/28] scsi: arcmsr: Drop PCI wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 09/28] scsi: arcmsr: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 10/28] scsi: esas2r: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 11/28] scsi: esas2r: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 12/28] scsi: hisi_sas_v3_hw: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 13/28] scsi: hisi_sas_v3_hw: use generic power management Vaibhav Gupta
2020-10-27 17:11   ` John Garry
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 14/28] scsi: mpt3sas_scsih: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 15/28] scsi: mpt3sas_scsih: use generic power management Vaibhav Gupta
2020-10-01 12:24 ` [Linux-kernel-mentees] [PATCH v3 16/28] scsi: lpfc: " Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 17/28] scsi: pm_8001: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:53   ` Jinpu Wang
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 18/28] scsi: pm_8001: use generic power management Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 19/28] scsi: hpsa: " Vaibhav Gupta
2020-10-27 16:16   ` Don.Brace--- via Linux-kernel-mentees [this message]
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 20/28] scsi: 3w-9xxx: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 21/28] scsi: 3w-9xxx: use generic power management Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 22/28] scsi: 3w-sas: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 23/28] scsi: 3w-sas: use generic power management Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 24/28] scsi: mvumi: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 25/28] scsi: mvumi: use generic power management Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 26/28] scsi: mvumi: update function description Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 27/28] scsi: pmcraid: Drop PCI Wakeup calls from .resume Vaibhav Gupta
2020-10-01 12:25 ` [Linux-kernel-mentees] [PATCH v3 28/28] scsi: pmcraid: use generic power management Vaibhav Gupta
2020-10-01 12:33 ` [Linux-kernel-mentees] [PATCH v3 00/28] scsi: " Vaibhav Gupta

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