From 58d9a38f6facb28e935ec2747f6d9e9bf4684118 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Mon, 21 Jan 2013 13:20:51 -0800 Subject: PCI: Skip attaching driver in device_add() We want to add PCI devices to the device tree as early as possible but delay attaching drivers. device_add() adds a device to the device hierarchy and (via device_attach()) attaches a matching driver and calls its .probe() method. We want to separate adding the device to the hierarchy from attaching the driver. This patch does that by adding "match_driver" in struct pci_dev. When false, we return failure from pci_bus_match(), which makes device_attach() believe there's no matching driver. Later, we set "match_driver = true" and call device_attach() again, which now attaches the driver and calls its .probe() method. [bhelgaas: changelog, explicitly init dev->match_driver, fold device_attach() call into pci_bus_add_device()] Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas Acked-by: Rafael J. Wysocki --- drivers/pci/bus.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/pci/bus.c') diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 847f3ca47bb8..c8709c6fdb7c 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -177,10 +177,15 @@ int pci_bus_add_device(struct pci_dev *dev) if (retval) return retval; + dev->match_driver = false; retval = device_add(&dev->dev); if (retval) return retval; + dev->match_driver = true; + retval = device_attach(&dev->dev); + WARN_ON(retval < 0); + dev->is_added = 1; pci_proc_attach_device(dev); pci_create_sysfs_dev_files(dev); -- cgit v1.2.1