linux-kernel - [PATCH v2 1/8] agp/efficeon: Convert to generic power management

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Message-Id: <20221025203852.681822-2-helgaas@kernel.org>
Date:   Tue, 25 Oct 2022 15:38:45 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     David Airlie <airlied@...hat.com>
Cc:     Krzysztof Wilczyński <kw@...ux.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Vaibhav Gupta <vaibhavgupta40@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-pci@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v2 1/8] agp/efficeon: Convert to generic power management

From: Bjorn Helgaas <bhelgaas@...gle.com>

Convert agpgart-efficeon from legacy PCI power management to the generic
power management framework.

Previously agpgart-efficeon used legacy PCI power management, which means
agp_efficeon_suspend() and agp_efficeon_resume() were responsible for both
device-specific things and generic PCI things like saving and restoring
config space and managing power state.

In this case, agp_efficeon_suspend() was empty, and agp_efficeon_resume()
already did only device-specific things, so simply convert it to take a
struct device * instead of a struct pci_dev *.

Based on 0aeddbd0cb07 ("via-agp: convert to generic power management") by
Vaibhav Gupta <vaibhavgupta40@...il.com>.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/char/agp/efficeon-agp.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index c53f0f9ef5b0..f28d42319269 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -412,18 +412,11 @@ static void agp_efficeon_remove(struct pci_dev *pdev)
 	agp_put_bridge(bridge);
 }
 
-#ifdef CONFIG_PM
-static int agp_efficeon_suspend(struct pci_dev *dev, pm_message_t state)
-{
-	return 0;
-}
-
-static int agp_efficeon_resume(struct pci_dev *pdev)
+static int agp_efficeon_resume(struct device *dev)
 {
 	printk(KERN_DEBUG PFX "agp_efficeon_resume()\n");
 	return efficeon_configure();
 }
-#endif
 
 static const struct pci_device_id agp_efficeon_pci_table[] = {
 	{
@@ -437,6 +430,8 @@ static const struct pci_device_id agp_efficeon_pci_table[] = {
 	{ }
 };
 
+static DEFINE_SIMPLE_DEV_PM_OPS(agp_efficeon_pm_ops, NULL, agp_efficeon_resume);
+
 MODULE_DEVICE_TABLE(pci, agp_efficeon_pci_table);
 
 static struct pci_driver agp_efficeon_pci_driver = {
@@ -444,10 +439,7 @@ static struct pci_driver agp_efficeon_pci_driver = {
 	.id_table	= agp_efficeon_pci_table,
 	.probe		= agp_efficeon_probe,
 	.remove		= agp_efficeon_remove,
-#ifdef CONFIG_PM
-	.suspend	= agp_efficeon_suspend,
-	.resume		= agp_efficeon_resume,
-#endif
+	.driver.pm	= &agp_efficeon_pm_ops,
 };
 
 static int __init agp_efficeon_init(void)
-- 
2.25.1