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| author | Corey Minyard <minyard@acm.org> | 2006-06-28 04:26:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-28 14:59:06 -0700 |
| commit | 96febe9fb7b04f2a078882d08bd6a997dee7cfa3 (patch) | |
| tree | 92f587109a90f142201748670ccf857a7af10135 /drivers | |
| parent | 1a245866f8a417250c0f82b16f7a6dcf0b812f58 (diff) | |
| download | linux-stable-96febe9fb7b04f2a078882d08bd6a997dee7cfa3.tar.gz linux-stable-96febe9fb7b04f2a078882d08bd6a997dee7cfa3.tar.bz2 linux-stable-96febe9fb7b04f2a078882d08bd6a997dee7cfa3.zip | |
[PATCH] IPMI: watchdog handle panic properly
Modify the watchdog timeout in IPMI to only do things at panic/reboot time if
the watchdog timer was already running. Some BIOSes do not disable the
watchdog timer at startup, and this led to a reboot a while later if the new
OS running didn't start monitoring the watchdog, even if the watchdog was not
running before.
Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/ipmi/ipmi_watchdog.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index 8f8867170973..1a0a19c53605 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -949,9 +949,10 @@ static int wdog_reboot_handler(struct notifier_block *this, /* Disable the WDT if we are shutting down. */ ipmi_watchdog_state = WDOG_TIMEOUT_NONE; panic_halt_ipmi_set_timeout(); - } else { + } else if (ipmi_watchdog_state != WDOG_TIMEOUT_NONE) { /* Set a long timer to let the reboot happens, but - reboot if it hangs. */ + reboot if it hangs, but only if the watchdog + timer was already running. */ timeout = 120; pretimeout = 0; ipmi_watchdog_state = WDOG_TIMEOUT_RESET; @@ -973,16 +974,17 @@ static int wdog_panic_handler(struct notifier_block *this, { static int panic_event_handled = 0; - /* On a panic, if we have a panic timeout, make sure that the thing - reboots, even if it hangs during that panic. */ - if (watchdog_user && !panic_event_handled) { - /* Make sure the panic doesn't hang, and make sure we - do this only once. */ + /* On a panic, if we have a panic timeout, make sure to extend + the watchdog timer to a reasonable value to complete the + panic, if the watchdog timer is running. Plus the + pretimeout is meaningless at panic time. */ + if (watchdog_user && !panic_event_handled && + ipmi_watchdog_state != WDOG_TIMEOUT_NONE) { + /* Make sure we do this only once. */ panic_event_handled = 1; timeout = 255; pretimeout = 0; - ipmi_watchdog_state = WDOG_TIMEOUT_RESET; panic_halt_ipmi_set_timeout(); } |