linux-kernel - [PATCH] x86, mce, amd: Read mcgstatus before we log the error

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Date:	Wed, 13 May 2015 12:37:04 -0500
From:	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
To:	<tony.luck@...el.com>, <bp@...en8.de>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <hpa@...or.com>
CC:	<x86@...nel.org>, <linux-edac@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
Subject: [PATCH] x86, mce, amd: Read mcgstatus before we log the error

Code to read mcgstatus was introduced with patch 44612a3ac.
However, that seems to have been accidentally removed in a3a529d10.
Adding that back here.

Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
---
 arch/x86/kernel/cpu/mcheck/mce_amd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index e99b150..7edfa4c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -319,6 +319,7 @@ static void __log_error(unsigned int bank, bool threshold_err, u64 misc)
 		return;
 
 	mce_setup(&m);
+	rdmsrl(MSR_IA32_MCG_STATUS, m.mcgstatus);
 
 	m.status = status;
 	m.bank = bank;
-- 
2.4.0

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