Commit a951c773 authored Jan 27, 2014 by Rafael J. Wysocki

ACPI / scan: Clear match_driver flag in acpi_bus_trim()



Drivers should not bind to struct acpi_device objects that
acpi_bus_trim() has been called for, so make that function
clear flags.match_driver for those objects.

If that is not done, an ACPI driver may theoretically try to operate
a device that is not physically present.

Fixes: 202317a5 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>

parent 00159a20

drivers/acpi/scan.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2044,6 +2044,7 @@ void acpi_bus_trim(struct acpi_device *adev)
		list_for_each_entry_reverse(child, &adev->children, node)
		acpi_bus_trim(child);

		adev->flags.match_driver = false;
		if (handler) {
		if (handler->detach)
		handler->detach(adev);

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