在 2020-08-19星期三的 09:11 +0100，Lee Jones写道：
> On Sat, 01 Aug 2020, Icenowy Zheng wrote:
>
> > When rewriting the OF match code of MFD core, addition of cells
> > disabled
> > in OF will result in a failure with error -ENODEV. This is an
> > unexpected
> > behavior, as the previous behavior is silently ignore the cell. On
> > SBCs with AXP20x PMICs, this leads to boot failure if AXP20x PMIC
> > support is built-in and some cells (especially power supply ones)
> > are
> > disabled.
>
> Thanks for reporting this.
>
> Do you mind if I fix this another way? I plan to reinstate the old
> code that was removed as part of the offending patch. I will of
> course add your Reported-by tag.
I think it's okay.
I will test it once it's out.
>
> > Silently ignore the cell when -ENODEV occurs.
> >
> > Fixes: e49aa9a9bd22 ("mfd: core: Make a best effort attempt to
> > match devices with the correct of_nodes")
> > Signed-off-by: Icenowy Zheng <icen...@aosc.io>
> > ---
> > drivers/mfd/mfd-core.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> > index c3ef58a802bee..31b363c64f4b4 100644
> > --- a/drivers/mfd/mfd-core.c
> > +++ b/drivers/mfd/mfd-core.c
> > @@ -215,8 +215,13 @@ static int mfd_add_device(struct device
> > *parent, int id,
> > ret = mfd_match_of_node_to_dev(pdev,
> > np, cell);
> > if (ret == -EAGAIN)
> > continue;
> > - if (ret)
> > + if (ret) {
> > + if (ret == -ENODEV) {
> > + /* Ignore disabled
> > devices error free */
> > + ret = 0;
> > + }
> > goto fail_alias;
> > + }
> >
> > break;
> > }
