linux-kernel - [PATCH 3.19.y-ckt 35/54] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce

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Date:	Mon,  9 May 2016 17:04:54 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Tony Luck <tony.luck@...el.com>,
	linux-edac <linux-edac@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 35/54] EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback

3.19.8-ckt21 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

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: Kamal Mostafa <kamal@...onical.com>
---
 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 9cd0b30..f84ef75 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1874,7 +1874,7 @@ 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 56b4019..2ce2997 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -2197,7 +2197,7 @@ 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;
 
 	/*
-- 
2.7.4