ACPI: install ACPI table handler before any dynamic tables being loaded

commit b1d248d96c71665c79befb81207f38f894c7c082 upstream.

ACPI table sysfs I/F is broken by commit

78f1699659963fff97975df44db6d5dbe7218e55
Author: Alex Chiang <achiang@hp.com>
Date:   Sun Dec 20 12:19:09 2009 -0700
    ACPI: processor: call _PDC early

because dynamic SSDT tables may be loaded in _PDC,
before installing the ACPI table handler.
As a result, the sysfs I/F of these dynamic tables are
located at  /sys/firmware/acpi/tables instead of
/sys/firmware/acpi/tables/dynamic, which is not true.

Invoke acpi_sysfs_init() before acpi_early_processor_set_pdc(),
so that the table handler is installed before any dynamic tables loaded.

https://bugzilla.kernel.org/show_bug.cgi?id=21142

CC: Dennis Jansen <dennis.jansen@web.de>
CC: Alex Chiang <achiang@hp.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 310e3b9749cbbacdabb3c03d288a6b42874aa41b..d68bd61072bb797e3e7f0413d6b97a9650f99222 100644 (file)
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -935,6 +935,12 @@ static int __init acpi_bus_init(void)
                goto error1;
        }
 
+       /*
+        * _PDC control method may load dynamic SSDT tables,
+        * and we need to install the table handler before that.
+        */
+       acpi_sysfs_init();
+
        acpi_early_processor_set_pdc();
 
        /*
@@ -1026,7 +1032,6 @@ static int __init acpi_init(void)
        acpi_scan_init();
        acpi_ec_init();
        acpi_power_init();
-       acpi_sysfs_init();
        acpi_debugfs_init();
        acpi_sleep_proc_init();
        acpi_wakeup_device_init();