[ofa-general] spin_lock_irqsave in ib_send_mad

[Suresh Shelvapille]

> It's not quite this simple.  Once the lock is released before calling
> ib_post_send, another thread could come down and queue a MAD to the overflow
> list.  If ib_post_send fails, the overflow list must be checked to see if a
> queued mad should now be sent.
> 

Why check the overflow list only when the ib_post_send fails? Don't you
need to do this regardless? It looks like you could get stuff into the overflow list
even with the existing code...