linux-kernel - Fix "buggy BIOS check" when CPUs are hot removed

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Message-Id: <1207352924.6294.29.camel@promb-2n-dhcp158.eng.vmware.com>
Date:	Fri, 04 Apr 2008 16:48:44 -0700
From:	Alok Kataria <akataria@...are.com>
To:	len.brown@...el.com, rui.zhang@...el.com
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Daniel Arai <arai@...are.com>, Zachary Amsden <zach@...are.com>
Subject: 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@...are.com>
Signed-off-by: Dan Arai <arai@...are.com>

---
drivers/acpi/processor_core.c |    1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/processor_core.c
b/drivers/acpi/processor_core.c
index 61450f4..0f95f26 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -828,6 +828,7 @@ static int acpi_processor_remove(struct acpi_device
*device, int type)
}

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

kfree(pr);

-- 
1.5.4


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