Re: [PATCH v3 7/8] mtd: rawnand: arasan: Add new Arasan NAND controller

[Boris Brezillon <boris.brezillon@collabora.com>]

On Thu, 7 May 2020 17:53:01 +0200
Miquel Raynal <miquel.raynal@bootlin.com> wrote:

> Hi Boris,
> 
> Boris Brezillon <boris.brezillon@collabora.com> wrote on Thu, 7 May
> 2020 17:24:53 +0200:
> 
> > On Thu, 7 May 2020 17:13:11 +0200
> > Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> >   
> > > Hi Boris,
> > > 
> > > Boris Brezillon <boris.brezillon@collabora.com> wrote on Thu, 7 May
> > > 2020 14:11:03 +0200:
> > >     
> > > > On Thu,  7 May 2020 13:00:33 +0200
> > > > Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> > > > 
> > > >       
> > > > > +
> > > > > +static void anfc_chips_cleanup(struct arasan_nfc *nfc)
> > > > > +{
> > > > > +	struct anand *anand, *tmp;
> > > > > +
> > > > > +	list_for_each_entry_safe(anand, tmp, &nfc->chips, node) {
> > > > > +		nand_release(&anand->chip);        
> > > > 
> > > > 		ret = mtd_device_unregister(nand_to_mtd(&anand->chip));
> > > > 		WARN_ON(ret);
> > > > 		nand_cleanup(&anand->chip);
> > > > 
> > > > Or maybe add this WARN_ON() to nand_release() so we don't have to ask
> > > > people to use mtd_device_unregister() + nand_cleanup().      
> > > 
> > > I don't get your point here? I'm not against adding a warn_on between
> > > both functions but it's not related to this driver?    
> > 
> > We've asked people to not call nand_release() but instead call
> > mtd_device_unregister()+nand_cleanup(), which is not done here. My
> > point is, if even us can't get it right, maybe it's a sign we should
> > instead patch nand_release() to do the right thing.  
> 
> It's in my todo-list, yes. What about just dropping nand_release
> entirely? So that nand_scan_tail as its nand cleanup and
> mtd_device_register as its mtd_device_unregister and everything will be
> much clearer?
> 

Yep, that would work too.