watchdog: wdt285: Fix variable type
Variable "new_margin" is checked in the function watchdog_ioctl() to be non-negative, so change its type to "int". Signed-off-by: NAlexander Shiyan <shc_work@mail.ru> Reviewed-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
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