nRF Watchdog not triggering on kernel panic

[tautologyclub]

If I configure watchdog and try it out with for example

while(1);

a wdt reset is always triggered. But if I try to trigger it with

k_panic();

the watchdog does nothing. The system just hangs indefinitely.

[tautologyclub]

Actually, the following snippet doesn't trigger it either:

typedef void (*bla)(void);
...
    	/* Try pissing off the MPU */
    	bla null_func = (bla)0;
        null_func();

[carlescufi]

@nordic-krch @kl-cruz @andrewboie what's the expected behavior for watchdogs when a kernel panic is triggered?

[ioannisg]

the system is expected to hang:

	if (reason == _NANO_ERR_KERNEL_PANIC) {
		goto hang_system;
	}

[ioannisg]

Actually, the following snippet doesn't trigger it either:

typedef void (*bla)(void);
...
    	/* Try pissing off the MPU */
    	bla null_func = (bla)0;
        null_func();

Can you post the exact output you see?

[andrewboie]

The system just hangs indefinitely.

What are you expecting to happen when k_panic() is called?
This does not seem like a bug to me.

[henrikbrixandersen]

I would at least expect to be able to configure this behavior. A system watchdog is not of much use, if not for resetting the CPU when an error occurs.