[net-next 05/12] i40e: add num_vectors checker in iwarp handler

[Jeff Kirsher]

From: Sergey Nemov <sergey.ne...@intel.com>

Field num_vectors from struct virtchnl_iwarp_qvlist_info should not be
larger than num_msix_vectors_vf in the hw struct.  The iwarp uses the
same set of vectors as the LAN VF driver.

Signed-off-by: Sergey Nemov <sergey.ne...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c 
b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 00345bbf68ec..25490cfb06fc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -442,6 +442,16 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
        u32 next_q_idx, next_q_type;
        u32 msix_vf, size;
 
+       msix_vf = pf->hw.func_caps.num_msix_vectors_vf;
+
+       if (qvlist_info->num_vectors > msix_vf) {
+               dev_warn(&pf->pdev->dev,
+                        "Incorrect number of iwarp vectors %u. Maximum %u 
allowed.\n",
+                        qvlist_info->num_vectors,
+                        msix_vf);
+               goto err;
+       }
+
        size = sizeof(struct virtchnl_iwarp_qvlist_info) +
               (sizeof(struct virtchnl_iwarp_qv_info) *
                                                (qvlist_info->num_vectors - 1));
-- 
2.20.1