[PATCH v4 1/4] mtd: rawnand: nand_bbt: hide suspend/resume hooks while scanning bbt

[Boris Brezillon]

On Mon, 1 Nov 2021 09:46:23 +0100
Sean Nyekjaer <sean at geanix.com> wrote:

> On Mon, Nov 01, 2021 at 08:38:24AM +0100, Boris Brezillon wrote:
> > On Tue, 26 Oct 2021 07:55:48 +0200
> > Sean Nyekjaer <sean at geanix.com> wrote:
> >   
> > > From: Boris Brezillon <boris.brezillon at collabora.com>
> > > 
> > > The BBT scan logic use the MTD helpers before the MTD layer had a
> > > chance to initialize the device, and that leads to issues when
> > > accessing the uninitialized suspend lock. Let's temporarily set the
> > > suspend/resume hooks to NULL to skip the lock acquire/release step.
> > > 
> > > Fixes: 013e6292aaf5 ("mtd: rawnand: Simplify the locking")  
> > 
> > I think I already mentioned this Fixes tag should not be there.
> >   
> 
> No, I didn't recall that, but nevermind :)
> 
> Hmm when ('mtd: core: protect access to MTD devices while in suspend')
> is backported we want to live with the use before init of the rwsem?

It's not meant to be backported. You'll need something simpler...

> 
> /Sean