Quoting Sai Prakash Ranjan (2021-01-26 07:02:41)
As per register documentation, QCOM_WDT_ENABLE_IRQ which is BIT(1) of watchdog control register is wakeup interrupt enable bit and not related to bark interrupt at all, BIT(0) is used for that. So remove incorrect usage of this bit when supporting bark irq for pre-timeout notification. Currently with this bit set and bark interrupt specified, pre-timeout notification and/or watchdog reset/bite does not occur.
It looks like the QCOM_WDT_ENABLE_IRQ bit is to catch a problem where a pending irq is unmasked but the watchdog irq isn't handled in time? So some sort of irq storm?
Fixes: 36375491a439 ("watchdog: qcom: support pre-timeout when the bark irq is available") Cc: stable@vger.kernel.org Signed-off-by: Sai Prakash Ranjan saiprakash.ranjan@codeaurora.org
Reviewed-by: Stephen Boyd swboyd@chromium.org