[2/3] ACPI / hotplug: Do not execute "insert in progress" _OST

Commit Message

Rafael J. Wysocki Nov. 5, 2013, 11:36 p.m. UTC

From: Rafael J. Wysocki <[e-mail]>

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 <[e-mail]>
---

Material for stable, in my opinion.

Thanks,
Rafael

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


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Patch

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,
-				  ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
 	error = acpi_bus_scan(handle);
 	if (error) {
 		acpi_handle_warn(handle, "Namespace scan failure\n");