ACPI / hotplug: Do not execute "insert in progress" _OST

commit 176a88d79d6b5aebabaff16734e8b3107efcaaad upstream.

According to the ACPI spec (5.0, Section 6.3.5), the "Device
insertion in progress (pending)" (0x80) _OST status code is
reserved for the "Insertion Processing" (0x200) source event
which is "a result of an OSPM action".  Specifically, it is not
a notification, so that status code should not be used during
notification processing, which unfortunately is done by
acpi_scan_bus_device_check().

For this reason, drop the ACPI_OST_SC_INSERT_IN_PROGRESS _OST
status evaluation from there (it was a mistake to put it in there
in the first place).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index af658b2ff2799de30d575e107a8309d292ca7adf..362f0c2aa1ea95eeb458d652e2c1fc22e959a8c1 100644 (file)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -244,8 +244,6 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
                        goto out;
                }
        }
-       acpi_evaluate_hotplug_ost(handle, ost_source,
-                                 ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
        error = acpi_bus_scan(handle);
        if (error) {
                acpi_handle_warn(handle, "Namespace scan failure\n");