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watchdog: reset last_hw_keepalive time at start

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[ Upstream commit 982bb70517aef2225bad1d802887b733db492cc0 ]

Currently the watchdog core does not initialize the last_hw_keepalive
time during watchdog startup. This will cause the watchdog to be pinged
immediately if enough time has passed from the system boot-up time, and
some types of watchdogs like K3 RTI does not like this.

To avoid the issue, setup the last_hw_keepalive time during watchdog
startup.

Signed-off-by: Tero Kristo <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Tero Kristo 2020-03-12 11:58:06 +02:00 • committed by Greg Kroah-Hartman
commit 66491dadd1
1 changed files with 1 additions and 0 deletions
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1
drivers/watchdog/watchdog_dev.c
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@ -282,6 +282,7 @@ static int watchdog_start(struct watchdog_device *wdd)
if (err == 0) {
set_bit(WDOG_ACTIVE, &wdd->status);
wd_data->last_keepalive = started_at;
wd_data->last_hw_keepalive = started_at;
watchdog_update_worker(wdd);
}