On Mon, Nov 4, 2019 at 9:01 AM Rob Herring <robh+dt@xxxxxxxxxx> wrote:
>
> On Mon, Oct 28, 2019 at 5:00 PM Saravana Kannan <saravanak@xxxxxxxxxx> wrote:
> >
> > When creating device links to proxy the sync_state() needs of child
> > dependencies, create SYNC_STATE_ONLY device links so that children
> > dependencies don't block probing of the parent.
> >
> > Also, differentiate between missing suppliers of parent device vs
> > missing suppliers of child devices so that driver core doesn't block
> > parent device probing when only child supplier dependencies are missing.
> >
> > Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
> > ---
> > drivers/of/property.c | 17 ++++++++++++-----
> > 1 file changed, 12 insertions(+), 5 deletions(-)
>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Thank you!
> One nit below:
>
> >
> > diff --git a/drivers/of/property.c b/drivers/of/property.c
> > index 2808832b2e86..f16f85597ccc 100644
> > --- a/drivers/of/property.c
> > +++ b/drivers/of/property.c
> > @@ -1032,10 +1032,10 @@ static bool of_is_ancestor_of(struct device_node *test_ancestor,
> > * - -EINVAL if the supplier link is invalid and should not be created
> > * - -ENODEV if there is no device that corresponds to the supplier phandle
> > */
> > -static int of_link_to_phandle(struct device *dev, struct device_node *sup_np)
> > +static int of_link_to_phandle(struct device *dev, struct device_node *sup_np,
> > + u32 dl_flags)
> > {
> > struct device *sup_dev;
> > - u32 dl_flags = DL_FLAG_AUTOPROBE_CONSUMER;
> > int ret = 0;
> > struct device_node *tmp_np = sup_np;
> >
> > @@ -1195,13 +1195,20 @@ static int of_link_property(struct device *dev, struct device_node *con_np,
> > unsigned int i = 0;
> > bool matched = false;
> > int ret = 0;
> > + u32 dl_flags;
> > +
> > + if (dev->of_node == con_np)
> > + dl_flags = DL_FLAG_AUTOPROBE_CONSUMER;
> > + else
> > + dl_flags = DL_FLAG_SYNC_STATE_ONLY;
> >
> > /* Do not stop at first failed link, link all available suppliers. */
> > while (!matched && s->parse_prop) {
> > while ((phandle = s->parse_prop(con_np, prop_name, i))) {
> > matched = true;
> > i++;
> > - if (of_link_to_phandle(dev, phandle) == -EAGAIN)
> > + if (of_link_to_phandle(dev, phandle, dl_flags)
> > + == -EAGAIN)
>
> nit: I'd just keep this one line or at least move '==' up.
You'd keep it one line even if it's > 80 cols? Ok, I'll move the "==" up.
-Saravana
