linux-kernel - [PATCH 3.2 34/46] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce

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Message-ID: <lsq.1465767282.387960996@decadent.org.uk>
Date:	Sun, 12 Jun 2016 22:34:42 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Mauro Carvalho Chehab" <mchehab@....samsung.com>,
	"linux-edac" <linux-edac@...r.kernel.org>,
	"Aristeu Rozanski" <aris@...hat.com>,
	"Borislav Petkov" <bp@...e.de>, "Tony Luck" <tony.luck@...el.com>
Subject: [PATCH 3.2 34/46] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD
 from mce_decoder callback

3.2.81-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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>
Link: http://lkml.kernel.org/r/72937355dd92318d2630979666063f8a2853495b.1461864507.git.tony.luck@intel.com
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/edac/i7core_edac.c | 2 +-
 drivers/edac/sb_edac.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1921,7 +1921,7 @@ static int i7core_mce_check_error(struct
 
 	i7_dev = get_i7core_dev(mce->socketid);
 	if (!i7_dev)
-		return NOTIFY_BAD;
+		return NOTIFY_DONE;
 
 	mci = i7_dev->mci;
 	pvt = mci->pvt_info;
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -1596,7 +1596,7 @@ static int sbridge_mce_check_error(struc
 
 	mci = get_mci_for_node_id(mce->socketid);
 	if (!mci)
-		return NOTIFY_BAD;
+		return NOTIFY_DONE;
 	pvt = mci->pvt_info;
 
 	/*