From a951c773bc39677ef3fa42814be7f5218a3100b2 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 27 Jan 2014 23:08:09 +0100
Subject: [PATCH] ACPI / scan: Clear match_driver flag in acpi_bus_trim()
Drivers should not bind to struct acpi_device objects that
acpi_bus_trim() has been called for, so make that function
clear flags.match_driver for those objects.
If that is not done, an ACPI driver may theoretically try to operate
a device that is not physically present.
Fixes: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
---
drivers/acpi/scan.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index c0f57ff15024..089dc403c43b 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2044,6 +2044,7 @@ void acpi_bus_trim(struct acpi_device *adev)
list_for_each_entry_reverse(child, &adev->children, node)
acpi_bus_trim(child);
+ adev->flags.match_driver = false;
if (handler) {
if (handler->detach)
handler->detach(adev);
--
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