[PATCH 3.11 26/36] ACPI / hotplug: Do not execute "insert in progress" _OST

Greg Kroah-Hartman
2013-11-26T18:16:26Z

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

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>

---
drivers/acpi/scan.c | 2 --
1 file changed, 2 deletions(-)

--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -359,8 +359,6 @@ static void acpi_scan_bus_device_check(a
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");