[PATCH v3 1/3] block: introduce zone_write_granularity limit

[Christoph Hellwig]

On Fri, Jan 22, 2021 at 08:56:58AM +0000, Damien Le Moal wrote:
> > This looks a little strange.  If we special case zoned vs not zoned
> > here anyway, why not set the zone_write_granularity to the logical
> > block size here by default.
> 
> The convention is zone_write_granularity == 0 for the BLK_ZONED_NONE case. Hence
> the reset here if we force the zoned model to none for HA drives. This way, this
> does not create a special case for HA drives used as regular disks.

Just inititialize it for all cases if you initialize it for some here.
That way everyone but sd already gets a right default and life becomes
simpler.