From a951c773bc39677ef3fa42814be7f5218a3100b2 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 27 Jan 2014 23:08:09 +0100 Subject: [PATCH] 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: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace) Signed-off-by: Rafael J. Wysocki Acked-by: Toshi Kani --- drivers/acpi/scan.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index c0f57ff15024..089dc403c43b 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -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); -- 2.39.2