From: Stefan Riedmueller <s.riedmueller@xxxxxxxxx> [ Upstream commit a0948ddba65f4f6d3cfb5e2b84685485d0452966 ] There is actually no need to ping the watchdog before disabling it during timeout change. Disabling the watchdog already takes care of resetting the counter. This fixes an issue during boot when the userspace watchdog handler takes over and the watchdog is already running. Opening the watchdog in this case leads to the first ping and directly after that without the required heartbeat delay a second ping issued by the set_timeout call. Due to the missing delay this resulted in a reset. Signed-off-by: Stefan Riedmueller <s.riedmueller@xxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20200403130728.39260-3-s.riedmueller@xxxxxxxxx Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/watchdog/da9062_wdt.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index 79383ff620199..1443386bb590b 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -94,11 +94,6 @@ static int da9062_wdt_update_timeout_register(struct da9062_watchdog *wdt, unsigned int regval) { struct da9062 *chip = wdt->hw; - int ret; - - ret = da9062_reset_watchdog_timer(wdt); - if (ret) - return ret; return regmap_update_bits(chip->regmap, DA9062AA_CONTROL_D, -- 2.25.1
