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Subject[PATCH 2/3] ACPI / hotplug: Do not execute "insert in progress" _OST
From: Rafael J. Wysocki <>

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

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 <>

Material for stable, in my opinion.


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

Index: linux-pm/drivers/acpi/scan.c
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -344,8 +344,6 @@ static void acpi_scan_bus_device_check(a
goto out;
- acpi_evaluate_hotplug_ost(handle, ost_source,
error = acpi_bus_scan(handle);
if (error) {
acpi_handle_warn(handle, "Namespace scan failure\n");

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