From 0aeddbd0cb078116c19b8ca511cc1882b581671b Mon Sep 17 00:00:00 2001 From: Vaibhav Gupta Date: Tue, 12 Jan 2021 13:39:24 +0530 Subject: [PATCH] via-agp: convert to generic power management Convert via-agp from legacy PCI power management to the generic power management framework. Previously, via-agp used legacy PCI power management, and agp_via_suspend() and agp_via_resume() were responsible for both device-specific things and generic PCI things: agp_via_suspend pci_save_state(pdev) <-- generic PCI pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI agp_via_resume pci_set_power_state(pdev, PCI_D0) <-- generic PCI pci_restore_state(pdev) <-- generic PCI via_configure_agp3() <-- device-specific via_configure() <-- device-specific With generic power management, the PCI bus PM methods do the generic PCI things, and the driver needs only the device-specific part, i.e., suspend_devices_and_enter dpm_suspend_start(PMSG_SUSPEND) pci_pm_suspend # PCI bus .suspend() method agp_via_suspend <-- not needed at all; removed suspend_enter dpm_suspend_noirq(PMSG_SUSPEND) pci_pm_suspend_noirq # PCI bus .suspend_noirq() method pci_save_state <-- generic PCI pci_prepare_to_sleep <-- generic PCI pci_set_power_state ... dpm_resume_end(PMSG_RESUME) pci_pm_resume # PCI bus .resume() method pci_restore_standard_config pci_set_power_state(PCI_D0) <-- generic PCI pci_restore_state <-- generic PCI agp_via_resume # dev->driver->pm->resume via_configure_agp3() <-- device-specific via_configure() <-- device-specific [bhelgaas: commit log] Link: https://lore.kernel.org/r/20211208193305.147072-4-helgaas@kernel.org Signed-off-by: Vaibhav Gupta Signed-off-by: Bjorn Helgaas Acked-by: Dave Airlie --- drivers/char/agp/via-agp.c | 25 +++++-------------------- 1 file changed, 5 insertions(+), 20 deletions(-) diff --git a/drivers/char/agp/via-agp.c b/drivers/char/agp/via-agp.c index 87a92a044570..a460ae352772 100644 --- a/drivers/char/agp/via-agp.c +++ b/drivers/char/agp/via-agp.c @@ -492,22 +492,11 @@ static void agp_via_remove(struct pci_dev *pdev) agp_put_bridge(bridge); } -#ifdef CONFIG_PM +#define agp_via_suspend NULL -static int agp_via_suspend(struct pci_dev *pdev, pm_message_t state) +static int __maybe_unused agp_via_resume(struct device *dev) { - pci_save_state (pdev); - pci_set_power_state (pdev, PCI_D3hot); - - return 0; -} - -static int agp_via_resume(struct pci_dev *pdev) -{ - struct agp_bridge_data *bridge = pci_get_drvdata(pdev); - - pci_set_power_state (pdev, PCI_D0); - pci_restore_state(pdev); + struct agp_bridge_data *bridge = dev_get_drvdata(dev); if (bridge->driver == &via_agp3_driver) return via_configure_agp3(); @@ -517,8 +506,6 @@ static int agp_via_resume(struct pci_dev *pdev) return 0; } -#endif /* CONFIG_PM */ - /* must be the same order as name table above */ static const struct pci_device_id agp_via_pci_table[] = { #define ID(x) \ @@ -567,16 +554,14 @@ static const struct pci_device_id agp_via_pci_table[] = { MODULE_DEVICE_TABLE(pci, agp_via_pci_table); +static SIMPLE_DEV_PM_OPS(agp_via_pm_ops, agp_via_suspend, agp_via_resume); static struct pci_driver agp_via_pci_driver = { .name = "agpgart-via", .id_table = agp_via_pci_table, .probe = agp_via_probe, .remove = agp_via_remove, -#ifdef CONFIG_PM - .suspend = agp_via_suspend, - .resume = agp_via_resume, -#endif + .driver.pm = &agp_via_pm_ops, };