RDMA/bnxt_re: Do not report transparent vlan from QP1

[ Upstream commit 2d0e60ee322d512fa6bc62d23a6760b39a380847 ]

QP1 Rx CQE reports transparent VLAN ID in the completion and this is used
while reporting the completion for received MAD packet. Check if the vlan
id is configured before reporting it in the work completion.

Fixes: 84511455ac5b ("RDMA/bnxt_re: report vlan_id and sl in qp1 recv completion")
Link: https://lore.kernel.org/r/1598292876-26529-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index ebc3e3d4a6e2ae367532f7111c19de0c81779a45..3b05c0640338f9244a45c2d5f6b3dd1d7026ece2 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2973,6 +2973,19 @@ static void bnxt_re_process_res_rawqp1_wc(struct ib_wc *wc,
        wc->wc_flags |= IB_WC_GRH;
 }
 
+static bool bnxt_re_check_if_vlan_valid(struct bnxt_re_dev *rdev,
+                                       u16 vlan_id)
+{
+       /*
+        * Check if the vlan is configured in the host.  If not configured, it
+        * can be a transparent VLAN. So dont report the vlan id.
+        */
+       if (!__vlan_find_dev_deep_rcu(rdev->netdev,
+                                     htons(ETH_P_8021Q), vlan_id))
+               return false;
+       return true;
+}
+
 static bool bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe *orig_cqe,
                                u16 *vid, u8 *sl)
 {
@@ -3041,9 +3054,11 @@ static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *qp,
        wc->src_qp = orig_cqe->src_qp;
        memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
        if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
-               wc->vlan_id = vlan_id;
-               wc->sl = sl;
-               wc->wc_flags |= IB_WC_WITH_VLAN;
+               if (bnxt_re_check_if_vlan_valid(rdev, vlan_id)) {
+                       wc->vlan_id = vlan_id;
+                       wc->sl = sl;
+                       wc->wc_flags |= IB_WC_WITH_VLAN;
+               }
        }
        wc->port_num = 1;
        wc->vendor_err = orig_cqe->status;