IB/ehca: Require in_wc in process_mad()

If the caller does not pass a valid in_wc to process_mad(), return MAD
failure status, as it is not possible to generate a valid MAD redirect
response (and redirects are the only MAD responses ehca generates).

Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/ehca/ehca_sqp.c b/drivers/infiniband/hw/ehca/ehca_sqp.c
index 8c1213f..dba8f9f 100644 (file)
--- a/drivers/infiniband/hw/ehca/ehca_sqp.c
+++ b/drivers/infiniband/hw/ehca/ehca_sqp.c
@@ -222,7 +222,7 @@ int ehca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 {
        int ret;
 
-       if (!port_num || port_num > ibdev->phys_port_cnt)
+       if (!port_num || port_num > ibdev->phys_port_cnt || !in_wc)
                return IB_MAD_RESULT_FAILURE;
 
        /* accept only pma request */