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Message-Id: <20190114023617.10656-1-mironov.ivan@gmail.com>
Date: Mon, 14 Jan 2019 07:36:13 +0500
From: Ivan Mironov <mironov.ivan@...il.com>
To: linux-watchdog@...r.kernel.org, mironov.ivan@...il.com
Cc: linux-kernel@...r.kernel.org,
Jerry Hoemann <jerry.hoemann@....com>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>
Subject: [RFC PATCH 0/4] watchdog: hpwdt: Fix NMI-related behaviour when CONFIG_HPWDT_NMI_DECODING is enabled
Hi,
I found out that hpwdt alters NMI behaviour unexpectedly if compiled
with enabled CONFIG_HPWDT_NMI_DECODING:
* System starts to panic on any NMI with misleading message.
* Watchdog provided by hpwdt is not working after such panic.
Here are the patches that should fix this.
This is an RFC patch series because I am not sure that patches are
correct. Questions:
* Are "mynmi" flags always set on all supported iLO versions when iLO
is the source of NMI?
* Is it safe to reset "mynmi" flags to zero if code decides to not panic?
Ivan Mironov (4):
watchdog: hpwdt: Don't disable watchdog on NMI
watchdog: hpwdt: Don't panic on foreign NMI
watchdog: hpwdt: Add more information into message
watchdog: hpwdt: Make panic behaviour configurable
drivers/watchdog/hpwdt.c | 45 ++++++++++++++++++++++------------------
1 file changed, 25 insertions(+), 20 deletions(-)
--
2.20.1
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