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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: 202317a573 (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>
This commit is contained in:
Rafael J. Wysocki 2014-01-27 23:08:09 +01:00
parent 00159a2013
commit a951c773bc
1 changed files with 1 additions and 0 deletions
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drivers/acpi/scan.c
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@ -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);