[openib-general] ibv_open_device() broken in r2720?

[Roland Dreier]

    Shirley> I am running netpipe test for ibv, the error is Couldn't
    Shirley> create InfiniBand context, seems like ibv_open_device()
    Shirley> return NULL for r2720. Is it broken, or I did something
    Shirley> wrong?

Are you using udev, or creating /dev/ entries by hand?  If you are not
using udev then you need to recreate the /dev/infiniband/uverbsN
files, since the base minor has moved from 128 or 192.

If that's not it, please post strace output for your program.

 - R.