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