IB/ehca: Ensure that guid_entry index is not negative

This prevents the memcpy() of a guid_entries element using a negative index.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_hca.c b/drivers/infiniband/hw/ehca/ehca_hca.c
index 9209c5332dfe..8b92f85d4dd0 100644
--- a/drivers/infiniband/hw/ehca/ehca_hca.c
+++ b/drivers/infiniband/hw/ehca/ehca_hca.c
@@ -319,7 +319,7 @@ int ehca_query_gid(struct ib_device *ibdev, u8 port,
                                               ib_device);
         struct hipz_query_port *rblock;
 
-        if (index > 255) {
+        if (index < 0 || index > 255) {
                 ehca_err(&shca->ib_device, "Invalid index: %x.", index);
                 return -EINVAL;
         }