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| author | Bernhard Walle <bwalle@suse.de> | 2008-10-26 15:59:37 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2008-12-01 15:55:10 +0000 |
| commit | 290172e79036fc25a22aaf3da4835ee634886183 (patch) | |
| tree | 9cbfb01fdbb4a390b84c1e929e55b38e0cae648a /drivers/watchdog | |
| parent | 060264133b946786b4b28a1ba79e6725eaf258f3 (diff) | |
| download | blackbird-op-linux-290172e79036fc25a22aaf3da4835ee634886183.tar.gz blackbird-op-linux-290172e79036fc25a22aaf3da4835ee634886183.zip | |
[WATCHDOG] hpwdt: Fix kdump when using hpwdt
When the "hpwdt" module is loaded (even if the /dev/watchdog device is not
opened), then kdump does not work. The panic kernel either does not start at
all or crash in various places.
The problem is that hpwdt_pretimeout is registered with register_die_notifier()
with the highest possible priority. Because it returns NOTIFY_STOP, the
crash_nmi_callback which is also registered with register_die_notifier()
is never executed. This causes the shutdown of other CPUs to fail.
Reverting the order is no option: The crash_nmi_callback executes HLT
and so never returns normally. Because of that, it must be executed as
last notifier, which currently is done.
So, that patch returns NOTIFY_OK to keep the crash_nmi_callback executed.
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/hpwdt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index f6cff7b5a547..763c1ea5dce5 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -485,7 +485,7 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason, "Management Log for details.\n"); } - return NOTIFY_STOP; + return NOTIFY_OK; } /* |
