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This reverts commit cb011044 ("watchdog: iTCO_wdt: Account for
rebooting on second timeout") and commit aec42642 ("watchdog: iTCO_wdt:
Fix detection of SMI-off case") since those patches cause a regression
on certain boards (https://bugzilla.kernel.org/show_bug.cgi?id=213809).

While this revert may result in some boards to only reset after twice
the configured timeout value, that is still better than a watchdog reset
after half the configured value.

Fixes: cb011044 ("watchdog: iTCO_wdt: Account for rebooting on second timeout")
Fixes: aec42642

 ("watchdog: iTCO_wdt: Fix detection of SMI-off case")
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Mantas Mikulėnas <grawity@gmail.com>
Reported-by: Javier S. Pedro <debbugs@javispedro.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20211008003302.1461733-1-linux@roeck-us.net

Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>