[ofa-general] [PATCH] IB/ipoib: avoid WARN_ON on NULL path->ah

[Roland Dreier]

 > > Moreover, that commit also allowed path resolution to be triggered
 > > for an invalid path; if that path resolution failed, old_ah would
 > > be freed outside priv->lock violating the assumption that dropping
 > > references inside the lock are guaranteed not to reach zero
 > > reference.

 > and what would happen next, I understand its the oops  shown in
 > https://bugs.openfabrics.org/show_bug.cgi?id=1194, I guess you want to
 > mention that in the change log

So is this patch fixing a crash or just avoiding a WARN_ON?  I'm not
going to send a change that just affects warnings for 2.6.27, but if
it's an oops that triggers in real life then that's different.