[ofw] [ofw'[Patch][umad] Avoid dangling reference

[Hal Rosenstock]

On Wed, Apr 20, 2011 at 10:42 AM, Hefty, Sean <sean.hefty at intel.com> wrote:
>> Some of the infiniband-diags can set the grh_present flag. I tested
>> perfquery with GRHs quite some time ago and I think there are other
>> diags which can do that too.
>
> I didn't see where anything would set grh_present in my search of the source code.  There's a place in libibmad, but it's inside an if statement.  Maybe it gets set indirectly somehow?  Do you happen to know where it can be set?

I think I only may have done this only with a private copy of
perfquery to test out the libibmad GRH code. I can try to find the
changes I made for this if you want... If I recall correctly, they're
pretty minor.