tree 9b40ce571009d8acae6b1023b5e50247d3f33d15
parent ee27a558ae0ff5063ccd6c47ca102c0bb0e3ba27
author Tom Tucker <tom@opengridcomputing.com> 1205260299 -0400
committer Linus Torvalds <torvalds@linux-foundation.org> 1205350654 -0700

SVCRDMA: Add xprt refs to fix close/unmount crash

RDMA connection shutdown on an SMP machine can cause a kernel crash due
to the transport close path racing with the I/O tasklet.

Additional transport references were added as follows:
- A reference when on the DTO Q to avoid having the transport
  deleted while queued for I/O.
- A reference while there is a QP able to generate events.
- A reference until the DISCONNECTED event is received on the CM ID

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>