netdev - Re: [net-next 02/11] devlink: add 'reset_dev_on_drv

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Date:   Fri, 6 Sep 2019 21:17:30 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Dirk van der Merwe <dirk.vandermerwe@...ronome.com>,
        Simon Horman <simon.horman@...ronome.com>,
        David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        oss-drivers@...ronome.com
Subject: Re: [net-next 02/11] devlink: add 'reset_dev_on_drv_probe' param

On Fri, 6 Sep 2019 11:40:54 -0700, Dirk van der Merwe wrote:
> >> DEVLINK_PARAM_RESET_DEV_VALUE_UNKNOWN (0)
> >> +			  Unknown or invalid value.  
> > Why do you need this? Do you have usecase for this value?  
> 
> I added this in to avoid having the entire netlink dump fail when there 
> are invalid values read from hardware.
> 
> This way, it can report an unknown or invalid value instead of failing 
> the operation.

That's the first reason, the second is that we also want to report 
the unknown value if it's not recognized by the driver. For u8/enum
parameters the value may possibly be set to a value older driver
doesn't understand, but users should still be able to set them to one
of the known ones.

We'd also like to add that to 'fw_load_policy'. WDYT?