[PATCH] watchdog: fix watchdog_set_timeout breakage for drivers like imxwd

[Ahmad Fatoum]

On 8/19/20 8:59 AM, Sascha Hauer wrote:
> Hi Ahmad,
> 
> On Tue, Aug 18, 2020 at 03:18:16PM +0200, Ahmad Fatoum wrote:
>> Commit 0b944fce55f4 ("watchdog: permit `wd 0` for non-stoppable, but
>> inactive, watchdogs") silently broke use of non-stoppable, but inactive,
>> watchdogs altogether.
> 
> Didn't this commit break *all* watchdogs? With 0b944fce55f4 an inactive
> watchdog will never be activated anymore.

watchdog_hw_running() returns -ENOSYS for watchdog that don't report whether
they are running, so it broke all those who do report it and are inactive at
driver probe time. 

> 
> Sascha
> 

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