linux-kernel - [PATCH 3.10 089/143] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce

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Date:	Sun,  5 Jun 2016 12:19:52 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Tony Luck <tony.luck@...el.com>,
	linux-edac <linux-edac@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 089/143] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback

From: Tony Luck <tony.luck@...el.com>

commit c4fc1956fa31003bfbe4f597e359d751568e2954 upstream.

Both of these drivers can return NOTIFY_BAD, but this terminates
processing other callbacks that were registered later on the chain.
Since the driver did nothing to log the error it seems wrong to prevent
other interested parties from seeing it. E.g. neither of them had even
bothered to check the type of the error to see if it was a memory error
before the return NOTIFY_BAD.

Signed-off-by: Tony Luck <tony.luck@...el.com>
Acked-by: Aristeu Rozanski <aris@...hat.com>
Acked-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc: linux-edac <linux-edac@...r.kernel.org>
Cc: <stable@...r.kernel.org>
Link: http://lkml.kernel.org/r/72937355dd92318d2630979666063f8a2853495b.1461864507.git.tony.luck@intel.com
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/edac/i7core_edac.c | 2 +-
 drivers/edac/sb_edac.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 271818a..c4131a7 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1878,7 +1878,7 @@ static int i7core_mce_check_error(struct notifier_block *nb, unsigned long val,
 
 	i7_dev = get_i7core_dev(mce->socketid);
 	if (!i7_dev)
-		return NOTIFY_BAD;
+		return NOTIFY_DONE;
 
 	mci = i7_dev->mci;
 	pvt = mci->pvt_info;
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 3bdefbf..0d40f7f 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -1538,7 +1538,7 @@ static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val,
 
 	mci = get_mci_for_node_id(mce->socketid);
 	if (!mci)
-		return NOTIFY_BAD;
+		return NOTIFY_DONE;
 	pvt = mci->pvt_info;
 
 	/*
-- 
2.8.0.rc2.1.gbe9624a