linux-kernel - [PATCH 2/5] x86: fix runtime error in arch/x86/kernel/cpu/mcheck/mce_amd

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Message-Id: <1201477122-4541-2-git-send-email-gregkh@suse.de>
Date:	Sun, 27 Jan 2008 15:38:39 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Jacob Shin <jacob.shin@....com>, Ingo Molnar <mingo@...e.hu>
Subject: [PATCH 2/5] x86: fix runtime error in arch/x86/kernel/cpu/mcheck/mce_amd_64.c

This problem is due to the kobject rework recently done in this file.

The mce_amd_64.c code uses some wierd forward calls to back out of the
recursive way the code creates kobjects.  Because of this, we need to
verify that we have really created a kobject before calling
kobject_uevent().

Many thanks to Yinghai Lu <yhlu.kernel@...il.com> for reporting the
problem and testing.

Cc: Yinghai Lu <yhlu.kernel@...il.com>
Cc: Jacob Shin <jacob.shin@....com>
Cc: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 arch/x86/kernel/cpu/mcheck/mce_amd_64.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
index 7535887..073afa7 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
@@ -450,7 +450,8 @@ recurse:
 	if (err)
 		goto out_free;
 
-	kobject_uevent(&b->kobj, KOBJ_ADD);
+	if (b)
+		kobject_uevent(&b->kobj, KOBJ_ADD);
 
 	return err;
 
-- 
1.5.3.8

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