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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2021-08-01 10:56:25 +0300 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2021-08-22 11:28:12 +0300 |
| commit | dbe80cf471f940db3063197b7adb1169f89be9ed (patch) | |
| tree | bc2ba2cc5a2addc328106ceab06ef7a9387645fa /drivers/watchdog/watchdog_dev.c | |
| parent | 585ba602b1ff76dd6e7fbd488a8c5921ae422305 (diff) | |
| download | linux-dbe80cf471f940db3063197b7adb1169f89be9ed.tar.xz | |
watchdog: Start watchdog in watchdog_set_last_hw_keepalive only if appropriate
We must not pet a running watchdog when handle_boot_enabled is off
because this will kick off automatic triggering before userland is
running, defeating the purpose of the handle_boot_enabled control.
Furthermore, don't ping in case watchdog_set_last_hw_keepalive was
called incorrectly when the hardware watchdog is actually not running.
Fixed: cef9572e9af3 ("watchdog: add support for adjusting last known HW keepalive time")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/93d56386-6e37-060b-55ce-84de8cde535f@web.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog/watchdog_dev.c')
| -rw-r--r-- | drivers/watchdog/watchdog_dev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c index 597cf16ea4ba..3a3d8b5c7ad5 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -1173,7 +1173,10 @@ int watchdog_set_last_hw_keepalive(struct watchdog_device *wdd, wd_data->last_hw_keepalive = ktime_sub(now, ms_to_ktime(last_ping_ms)); - return __watchdog_ping(wdd); + if (watchdog_hw_running(wdd) && handle_boot_enabled) + return __watchdog_ping(wdd); + + return 0; } EXPORT_SYMBOL_GPL(watchdog_set_last_hw_keepalive); |