xen-platform: Convert to generic power management

Convert xen-platform from the legacy PCI power management callbacks to the
generic operations.  This is one step towards removing support for the
legacy PCI callbacks.

The generic .resume_noirq() operation is called by pci_pm_resume_noirq() at
the same point the legacy PCI .resume_early() callback was, so this patch
should not change the xen-platform behavior.

Link: https://lore.kernel.org/r/20191101204558.210235-5-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: KarimAllah Ahmed <karahmed@amazon.de>

diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index 5e30602..59e85e4 100644 (file)
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -74,7 +74,7 @@ static int xen_allocate_irq(struct pci_dev *pdev)
                        "xen-platform-pci", pdev);
 }
 
-static int platform_pci_resume(struct pci_dev *pdev)
+static int platform_pci_resume(struct device *dev)
 {
        int err;
 
@@ -83,7 +83,7 @@ static int platform_pci_resume(struct pci_dev *pdev)
 
        err = xen_set_callback_via(callback_via);
        if (err) {
-               dev_err(&pdev->dev, "platform_pci_resume failure!\n");
+               dev_err(dev, "platform_pci_resume failure!\n");
                return err;
        }
        return 0;
@@ -168,13 +168,17 @@ static const struct pci_device_id platform_pci_tbl[] = {
        {0,}
 };
 
+static struct dev_pm_ops platform_pm_ops = {
+       .resume_noirq =   platform_pci_resume,
+};
+
 static struct pci_driver platform_driver = {
        .name =           DRV_NAME,
        .probe =          platform_pci_probe,
        .id_table =       platform_pci_tbl,
-#ifdef CONFIG_PM
-       .resume_early =   platform_pci_resume,
-#endif
+       .driver = {
+               .pm =     &platform_pm_ops,
+       },
 };
 
 builtin_pci_driver(platform_driver);