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Old 06-23-2008, 11:41 PM
Alok Kataria
 
Default ACPI: fix "buggy BIOS check" when CPUs are hot removed

Already in mainline....required for CPU hotplug.

--

VMware, Inc. is providing the following patch to you under the terms of the GPL
version 2 and no later version. This patch is provided as is, with no
warranties or support. VMware disclaims all liability in connection with
the use/inability to use this patch. Any use of the attached is
considered acceptance of the above.

commit ba62b077871a5255e271f4fdae57167651839277
Author: Alok Kataria <akataria@vmware.com>
Date: Tue Apr 8 17:41:56 2008 -0700

acpi: fix "buggy BIOS check" when CPUs are hot removed

Fixes a BUG in ACPI hotplugging.

processor_device_array[pr->id] needs to be set to NULL when removing a CPU.
Else the "buggy BIOS check" in acpi_processor_start mistakenly fires when a
CPU is removed from the system and then later re-added.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Arai <arai@vmware.com>
Cc: Len Brown <lenb@kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Index: ubuntu-hardy/drivers/acpi/processor_core.c
================================================== =================
--- ubuntu-hardy.orig/drivers/acpi/processor_core.c 2008-06-06 10:59:05.000000000 -0700
+++ ubuntu-hardy/drivers/acpi/processor_core.c 2008-06-12 10:28:15.000000000 -0700
@@ -792,7 +792,7 @@
acpi_processor_remove_fs(device);

processors[pr->id] = NULL;
-
+ processor_device_array[pr->id] = NULL;
kfree(pr);

return 0;



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