PCI: Skip attaching driver in device_add()

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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 <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Yinghai Lu 2013-01-21 13:20:51 -08:00 • committed by Bjorn Helgaas

parent d59f53bc9b

commit 58d9a38f6f

3 changed files with 11 additions and 1 deletions

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5

drivers/pci/bus.c

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6

drivers/pci/pci-driver.c

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1

include/linux/pci.h

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