linux-kernel - [PATCH] ACPI: pass correct parameter to acpi_processor_ffh_cstate_probe

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Message-ID: <20090312074524.GA15992@localhost>
Date:	Thu, 12 Mar 2009 15:45:24 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Ingo Molnar <mingo@...e.hu>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	Len Brown <len.brown@...el.com>,
	Zhao Yakui <yakui.zhao@...el.com>
Subject: [PATCH] ACPI: pass correct parameter to
	acpi_processor_ffh_cstate_probe_cpu()

This fixes a NULL pointer dereference bug introduced by 6e911954cac.

Signed-off-by: Wu Fengguang <fengguang.wu@...el.com>
---
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 6626e8c..b866b87 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -137,7 +137,7 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 	/* Run acpi_processor_ffh_cstate_probe_cpu() on the target CPU */
 
 	retval = smp_call_function_single(cpu,
-				acpi_processor_ffh_cstate_probe_cpu, cx, 1);
+				acpi_processor_ffh_cstate_probe_cpu, &cxcc, 1);
 	if (retval == 0) {
 		retval = cxcc.retval;
 		if (retval == 0) {
--
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