Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH] ACPI / scan: Clear match_driver flag in acpi_bus_trim() | Date | Mon, 27 Jan 2014 01:16:09 +0100 |
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From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> --- drivers/acpi/scan.c | 1 + 1 file changed, 1 insertion(+)
Index: linux-pm/drivers/acpi/scan.c =================================================================== --- linux-pm.orig/drivers/acpi/scan.c +++ linux-pm/drivers/acpi/scan.c @@ -2106,6 +2106,7 @@ void acpi_bus_trim(struct acpi_device *a 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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