RE: [PATCH] ZEN: fix platform_no_drv_owner.cocci warnings

["Reshetova, Elena" <elena.reshetova@intel.com>]

> From: kbuild test robot <lkp@intel.com>
> 
> Remove .owner field if calls are used which set it automatically
> 
> Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
> 
> Fixes: 26e2aa63d568 ("ZEN: Add VHBA driver")
> Signed-off-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
> 
> ---
> 
> There was also a report about:
> 
> drivers/scsi/vhba/vhba.c:184:8-27: atomic_dec_and_test variation before
> object free at line 185.
> 
> that Elena may want to comment on.
> 
>

Yes, on a quick look it seems that you should be using refcount_t type and not
atomic_t for your reference counter, as you use it as classical refcounter, i.e. 
free  the object upon reaching zero, etc:

static void vhba_device_put (struct vhba_device *vdev)
{
    if (atomic_dec_and_test(&vdev->refcnt)) {
        kfree(vdev);
    }
}

Any reason why you didn't use refcount_t type to begin with?

Best Regards,
Elena.