[ofa-general] Re: [openib-general] [PATCH] IB/core: Set static rate in ib_init_ah_from_path()

[Sean Hefty]

> int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
>                          struct ib_sa_path_rec *rec, struct ib_ah_attr 
> *ah_attr)
> {
>         int ret;
>         u16 gid_index;
> 
>         memset(ah_attr, 0, sizeof *ah_attr);
>         ah_attr->dlid = be16_to_cpu(rec->dlid);
>         ah_attr->sl = rec->sl;
>         ah_attr->src_path_bits = be16_to_cpu(rec->slid) & 0x7f;

I looked at this more, and to be technically correct here, what we can do is:

in update_sm_ah:
    use port_attr.LMC to record a src_path_mask with ib_sa_port

in ib_init_ah_from_path:
    use the src_path_mask from ib_sa_port to set src_path_bits

However, I'm not completely convinced that masking off the upper bits of the 
SLID is necessary when setting the src_path_bits, which means that the mask used 
above could be removed.

- Sean