Re: [PATCH 12/44] mfd: ab8500-sysctrl: Register with kernel poweroff handler

Lee Jones
2014-10-09T10:49:27Z

On Thu, 09 Oct 2014, Catalin Marinas wrote:

> On Tue, Oct 07, 2014 at 09:00:48AM +0100, Lee Jones wrote:
> > On Mon, 06 Oct 2014, Guenter Roeck wrote:
> > > --- a/drivers/mfd/ab8500-sysctrl.c
> > > +++ b/drivers/mfd/ab8500-sysctrl.c
> > > @@ -6,6 +6,7 @@
> >=20
> > [...]
> >=20
> > > +static int ab8500_power_off(struct notifier_block *this, unsigne=
d long unused1,
> > > + void *unused2)
> > > {
> > > sigset_t old;
> > > sigset_t all;
> > > @@ -34,11 +36,6 @@ static void ab8500_power_off(void)
> > > struct power_supply *psy;
> > > int ret;
> > > =20
> > > - if (sysctrl_dev =3D=3D NULL) {
> > > - pr_err("%s: sysctrl not initialized\n", __func__);
> > > - return;
> > > - }
> >=20
> > Can you explain the purpose of this change please?
>=20
> I guess it's because the sysctrl_dev is already initialised when
> registering the power_off handler, so there isn't a way to call the
> above function with a NULL sysctrl_dev. Probably even with the origin=
al
> code you didn't need this check (after some race fix in
> ab8500_sysctrl_remove but races is one of the things Guenter's patche=
s
> try to address).

Sounds reasonable, although I think this change should be part of
another patch.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
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