| Date | Wed, 16 Apr 2008 18:02:15 -0700 | From | Chris Wright <> | Subject | acpi: fix "buggy BIOS check" when CPUs are hot removed |
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-stable review patch. If anyone has any objections, please let us know. ---------------------
From: Alok Kataria <akataria@vmware.com>
upstream commit: ba62b077871a5255e271f4fdae57167651839277
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> Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- drivers/acpi/processor_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -792,7 +792,7 @@ static int acpi_processor_remove(struct acpi_processor_remove_fs(device); processors[pr->id] = NULL; - + processor_device_array[pr->id] = NULL; kfree(pr); return 0; --
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