On 23/09/2022 11:13, Jason Yan wrote:
Please explain why.
I would assume that if those helpers were only used in libsas code
(and not LLDDs) then they could be put in sas_internal.h and no need
for export
Sorry, I did not make it clear. I mean we need to export
sas_find_attathed_phy() below. Not the sas address comparation helpers.
That seems fine to me.
About sas_find_attathed_phy() implementation,
> +static inline int sas_find_attathed_phy(struct expander_device *ex_dev,
> + struct domain_device *dev)
> +{
> + struct ex_phy *phy;
> + int phy_id;
> +
> + for (phy_id = 0; phy_id < ex_dev->num_phys; phy_id++) {
> + phy = &ex_dev->ex_phy[phy_id];
> + if (SAS_ADDR(phy->attached_sas_addr)
> + == SAS_ADDR(dev->sas_addr))
> + return phy_id;
> + }
> +
> + return ex_dev->num_phys;
Returning ex_dev->num_phys would seem ok, but then the LLDD needs to
check that return against ex_dev->num_phys. It seems ok, but I'm still
not 100% comfortable with that. Maybe returning -ENODEV may be better.
Or return boolean and pass phy_id as pointer to be filled in when
returning true.
> +}
Thanks,
John
