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authorsantosh.shilimkar@oracle.com <santosh.shilimkar@oracle.com>2015-08-22 15:45:35 -0700
committerDavid S. Miller <davem@davemloft.net>2015-08-25 13:35:31 -0700
commitae05368afa7ea27fd906477874ed3ebc7df7e53c (patch)
treeaf4794b0d02f133a35fed64419d83f4ed84767e6 /net/rds
parent06e8941e22f5cbaa4051f06d7ac99e3f302f6d48 (diff)
downloadop-kernel-dev-ae05368afa7ea27fd906477874ed3ebc7df7e53c.zip
op-kernel-dev-ae05368afa7ea27fd906477874ed3ebc7df7e53c.tar.gz
RDS: check for valid cm_id before initiating connection
Connection could have been dropped while the route is being resolved so check for valid cm_id before initiating the connection. Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com> Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/rdma_transport.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c
index 2082408..b9b40af 100644
--- a/net/rds/rdma_transport.c
+++ b/net/rds/rdma_transport.c
@@ -34,6 +34,7 @@
#include <rdma/rdma_cm.h>
#include "rdma_transport.h"
+#include "ib.h"
static struct rdma_cm_id *rds_rdma_listen_id;
@@ -82,8 +83,18 @@ int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
break;
case RDMA_CM_EVENT_ROUTE_RESOLVED:
- /* XXX worry about racing with listen acceptance */
- ret = trans->cm_initiate_connect(cm_id);
+ /* Connection could have been dropped so make sure the
+ * cm_id is valid before proceeding
+ */
+ if (conn) {
+ struct rds_ib_connection *ibic;
+
+ ibic = conn->c_transport_data;
+ if (ibic && ibic->i_cm_id == cm_id)
+ ret = trans->cm_initiate_connect(cm_id);
+ else
+ rds_conn_drop(conn);
+ }
break;
case RDMA_CM_EVENT_ESTABLISHED:
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