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[ Upstream commitdaa814d784] Commitda23b6faa8("watchdog: iTCO: Add support for Cannon Lake PCH iTCO") does not mask NMI_NOW bit during TCO1_CNT register's value comparison for update_no_reboot_bit() call causing following failure: ... iTCO_vendor_support: vendor-support=0 iTCO_wdt iTCO_wdt: unable to reset NO_REBOOT flag, device disabled by hardware/BIOS ... and this can lead to unexpected NMIs later during regular crashkernel's workflow because of watchdog probe call failures. This change masks NMI_NOW bit for TCO1_CNT register values to avoid unexpected NMI_NOW bit inversions. Fixes:da23b6faa8("watchdog: iTCO: Add support for Cannon Lake PCH iTCO") Signed-off-by: Oleksandr Ocheretnyi <oocheret@cisco.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/r/20240913191403.2560805-1-oocheret@cisco.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Sasha Levin <sashal@kernel.org>