svcrdma: Add dma map count and WARN_ON

Add a dma map count in order to verify that all DMA mapping resources
have been freed when the transport is closed.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index fd5e8a1c17de..ab93afc03c43 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -130,6 +130,7 @@ struct svcxprt_rdma {
 
         struct ib_pd         *sc_pd;
 
+        atomic_t             sc_dma_used;
         atomic_t             sc_ctxt_used;
         struct list_head     sc_ctxt_free;
         int                  sc_ctxt_cnt;