• Guenter Roeck's avatar
    watchdog: core: Clear WDOG_HW_RUNNING before calling the stop function · 3c10bbde
    Guenter Roeck authored
    WDOG_HW_RUNNING indicates that the hardware watchdog is running while the
    watchdog device is closed. The flag may be set by the driver when it is
    instantiated to indicate that the watchdog is running, and that the
    watchdog core needs to send heartbeat requests to the driver until the
    watchdog device is opened.
    
    When the watchdog device is closed, the flag can be used by the driver's
    stop function to indicate to the watchdog core that it was unable to stop
    the watchdog, and that the watchdog core needs to send heartbeat requests.
    This only works if the flag is actually cleared when the watchdog is
    stopped. To avoid having to clear the flag in each driver's stop function,
    clear it in the watchdog core before calling the stop function.
    Reported-by: default avatarRasmus Villemoes <rasmus.villemoes@prevas.dk>
    Fixes: ee142889 ("watchdog: Introduce WDOG_HW_RUNNING flag")
    Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
    Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
    3c10bbde
watchdog_dev.c 24.6 KB