linux-kernel - [PATCH 3.12 024/116] ACPI / hotplug: Do not execute "insert in progress"

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Message-Id: <20131127005738.617600527@linuxfoundation.org>
Date:	Tue, 26 Nov 2013 16:56:37 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 3.12 024/116] ACPI / hotplug: Do not execute "insert in progress" _OST

3.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Rafael J. Wysocki" <rafael.j.wysocki@...el.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@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -331,8 +331,6 @@ 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");

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