[PATCH] IB/ipath: don't allow resources to be created with illegal values

Signed-off-by: Robert Walsh <robert.walsh@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index 47271be65b0f..e6fc4c02823f 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -667,6 +667,14 @@ struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
                 goto bail;
         }
 
+        if (init_attr->cap.max_send_sge +
+            init_attr->cap.max_recv_sge +
+            init_attr->cap.max_send_wr +
+            init_attr->cap.max_recv_wr == 0) {
+                ret = ERR_PTR(-EINVAL);
+                goto bail;
+        }
+
         switch (init_attr->qp_type) {
         case IB_QPT_UC:
         case IB_QPT_RC: