linux-kernel - [PATCH] EDAC, MCE, AMD: Don't emit 'CE' for Deferred error

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Date:	Mon, 13 Jul 2015 06:53:02 -0500
From:	Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
To:	<bp@...en8.de>, <dougthompson@...ssion.com>,
	<mchehab@....samsung.com>
CC:	<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] EDAC, MCE, AMD: Don't emit 'CE' for Deferred error

Currently, we also display 'CE' for a Deferred error.
like so-
[Hardware Error]: CPU:0 (15:2:0)
MC4_STATUS[Over|CE|MiscV|-|AddrV|Deferred|-|UECC]: 0xdc04b00095080813

When the 'UC' bit on MCx_STATUS register is clear, the error status
is either a Corrected error or Deferred error as determined by the
'Deferred' bit.

Refer AMD Error Scope Hierarchy table in a newer BKDG
(example: 49125_15h_Models_30h-3Fh_BKDG.pdf, section "RAS Features")
for clarification.

Therefore, fix the output to not disply 'CE'

Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
---
 drivers/edac/mce_amd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 58586d5..e3a945c 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -763,7 +763,8 @@ int amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
 		c->x86, c->x86_model, c->x86_mask,
 		m->bank,
 		((m->status & MCI_STATUS_OVER)	? "Over"  : "-"),
-		((m->status & MCI_STATUS_UC)	? "UE"	  : "CE"),
+		((m->status & MCI_STATUS_UC)	? "UE"	  :
+		 (m->status & MCI_STATUS_DEFERRED) ? "-"  : "CE"),
 		((m->status & MCI_STATUS_MISCV)	? "MiscV" : "-"),
 		((m->status & MCI_STATUS_PCC)	? "PCC"	  : "-"),
 		((m->status & MCI_STATUS_ADDRV)	? "AddrV" : "-"));
-- 
2.4.0

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