Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 2/2] ACPI / scan: Avoid enumerating devices more than once | Date | Mon, 17 Apr 2017 01:20:48 +0200 |
| |
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
acpi_bus_attach() does not check the visited flag for devices that have been enumerated already and some of them may be enumerated for multiple times as a result, because some callers of acpi_bus_scan() don't check the visited flag either.
For this reason, modify acpi_bus_attach() to check the visited flag and avoid enumerating devices that have already been enumerated.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> --- drivers/acpi/scan.c | 2 ++ 1 file changed, 2 insertions(+)
Index: linux-pm/drivers/acpi/scan.c =================================================================== --- linux-pm.orig/drivers/acpi/scan.c +++ linux-pm/drivers/acpi/scan.c @@ -1850,6 +1850,8 @@ static void acpi_bus_attach(struct acpi_ device->flags.power_manageable = 0; device->flags.initialized = true; + } else if (device->flags.visited) { + goto ok; } ret = acpi_scan_attach_handler(device);
| |