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Mon, 20 Jul 2020 06:17:50 -0700 (PDT) Date: Mon, 20 Jul 2020 18:46:27 +0530 From: Vaibhav Gupta To: Damien Le Moal Message-ID: <20200720131627.GA447599@gmail.com> References: <20200717080910.342741-1-vaibhavgupta40@gmail.com> <20200717080910.342741-4-vaibhavgupta40@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Cc: Jens Axboe , "linux-kernel@vger.kernel.org" , "linux-block@vger.kernel.org" , Bjorn Helgaas , Bjorn Helgaas , Philip Kelleher , "linux-kernel-mentees@lists.linuxfoundation.org" , Joshua Morris Subject: Re: [Linux-kernel-mentees] [PATCH v1 3/3] skd: 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 12:52:14PM +0000, Damien Le Moal wrote: > On 2020/07/17 17:10, Vaibhav Gupta wrote: > > Drivers using legacy PM have to manage PCI states and device's PM states > > themselves. They also need to take care of configuration registers. > > > > With improved and powerful support of generic PM, PCI Core takes care of > > above mentioned, device-independent, jobs. > > > > This driver makes use of PCI helper functions like > > pci_save/restore_state(), pci_enable/disable_device(), > > pci_request/release_regions(), pci_set_power_state() and > > pci_set_master() to do required operations. In generic mode, they are no > > longer needed. > > > > Change function parameter in both .suspend() and .resume() to > > "struct device*" type. Use to_pci_dev() to get "struct pci_dev*" variable. > > > > Compile-tested only. > > I do not think this belongs into the commit message. This was mentioned in the > cover letter. > The messages in cover letter and commit message are bit similar. But the commit message has patch specific changes mentioned in it. > > > > Signed-off-by: Vaibhav Gupta > > --- > > drivers/block/skd_main.c | 36 ++++++++++-------------------------- > > 1 file changed, 10 insertions(+), 26 deletions(-) > > > > diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c > > index 51569c199a6c..d8d1042e7338 100644 > > --- a/drivers/block/skd_main.c > > +++ b/drivers/block/skd_main.c > > @@ -3315,12 +3315,12 @@ static void skd_pci_remove(struct pci_dev *pdev) > > return; > > } > > > > -static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) > > +static int __maybe_unused skd_pci_suspend(struct device *dev) > > { > > int i; > > - struct skd_device *skdev; > > + struct pci_dev *pdev = to_pci_dev(dev); > > + struct skd_device *skdev = pci_get_drvdata(pdev); > > You can just add the pdev declaration here. The other 2 changes are not needed. > Okay. > > > > - skdev = pci_get_drvdata(pdev); > > You can keep this as is. > > > if (!skdev) { > > dev_err(&pdev->dev, "no device data for PCI\n"); > > return -EIO; > > @@ -3337,35 +3337,23 @@ static int skd_pci_suspend(struct pci_dev *pdev, pm_message_t state) > > if (skdev->pcie_error_reporting_is_enabled) > > pci_disable_pcie_error_reporting(pdev); > > > > - pci_release_regions(pdev); > > - pci_save_state(pdev); > > - pci_disable_device(pdev); > > - pci_set_power_state(pdev, pci_choose_state(pdev, state)); > > return 0; > > } > > > > -static int skd_pci_resume(struct pci_dev *pdev) > > +static int __maybe_unused skd_pci_resume(struct device *dev) > > { > > int i; > > int rc = 0; > > - struct skd_device *skdev; > > > > - skdev = pci_get_drvdata(pdev); > > Same comment as above. Keep these as is and add only pdev declaration. > Okay. Sending v2 with suggested changes. --Vaibhav Gupta > > + struct pci_dev *pdev = to_pci_dev(dev); > > + struct skd_device *skdev = pci_get_drvdata(pdev); > > if (!skdev) { > > dev_err(&pdev->dev, "no device data for PCI\n"); > > return -1; > > } > > > > - pci_set_power_state(pdev, PCI_D0); > > - pci_enable_wake(pdev, PCI_D0, 0); > > - pci_restore_state(pdev); > > + device_wakeup_disable(dev); > > > > - rc = pci_enable_device(pdev); > > - if (rc) > > - return rc; > > - rc = pci_request_regions(pdev, DRV_NAME); > > - if (rc) > > - goto err_out; > > rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); > > if (rc) > > rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); > > @@ -3374,7 +3362,6 @@ static int skd_pci_resume(struct pci_dev *pdev) > > goto err_out_regions; > > } > > > > - pci_set_master(pdev); > > rc = pci_enable_pcie_error_reporting(pdev); > > if (rc) { > > dev_err(&pdev->dev, > > @@ -3427,10 +3414,6 @@ static int skd_pci_resume(struct pci_dev *pdev) > > pci_disable_pcie_error_reporting(pdev); > > > > err_out_regions: > > - pci_release_regions(pdev); > > - > > -err_out: > > - pci_disable_device(pdev); > > return rc; > > } > > > > @@ -3450,13 +3433,14 @@ static void skd_pci_shutdown(struct pci_dev *pdev) > > skd_stop_device(skdev); > > } > > > > +static SIMPLE_DEV_PM_OPS(skd_pci_pm_ops, skd_pci_suspend, skd_pci_resume); > > + > > static struct pci_driver skd_driver = { > > .name = DRV_NAME, > > .id_table = skd_pci_tbl, > > .probe = skd_pci_probe, > > .remove = skd_pci_remove, > > - .suspend = skd_pci_suspend, > > - .resume = skd_pci_resume, > > + .driver.pm = &skd_pci_pm_ops, > > .shutdown = skd_pci_shutdown, > > }; > > > > > > > -- > Damien Le Moal > Western Digital Research _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees