IB/ipath: Improve UD loopback performance by allocating temp array only once

Receive work queue entries are checked for L_Key validity, and
pointers to the memory region structure are saved in an allocated
structure.  For UD loopback packets, this structure is allocated and
freed for each packet.  This patch changes that to allocate/free
during QP creation and destruction.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.h b/drivers/infiniband/hw/ipath/ipath_verbs.h
index 9d12ae8a778e..11e3f613df93 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.h
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h
@@ -431,6 +431,7 @@ struct ipath_qp {
         u32 s_lsn;              /* limit sequence number (credit) */
         struct ipath_swqe *s_wq;        /* send work queue */
         struct ipath_swqe *s_wqe;
+        struct ipath_sge *r_ud_sg_list;
         struct ipath_rq r_rq;           /* receive work queue */
         struct ipath_sge r_sg_list[0];  /* verified SGEs */
 };