RDMA/hns: Avoid filling sl in high 3 bits of vlan_id

Only the low 12 bits of vlan_id is valid, and service level has been
filled in Address Vector. So there is no need to fill sl in vlan_id in
Address Vector.

Fixes: 7406c0036f ("RDMA/hns: Only record vlan info for HIP08")
Link: https://lore.kernel.org/r/1607650657-35992-5-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hns/hns_roce_ah.c

@@ -36,9 +36,6 @@
 #include <rdma/ib_cache.h>
 #include "hns_roce_device.h"
 
-#define VLAN_SL_MASK 7
-#define VLAN_SL_SHIFT 13
-
 static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
 {
 	u32 fl = ah_attr->grh.flow_label;
@@ -84,18 +81,12 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
 
 	/* HIP08 needs to record vlan info in Address Vector */
 	if (hr_dev->pci_dev->revision <= PCI_REVISION_ID_HIP08) {
-		ah->av.vlan_en = 0;
-
 		ret = rdma_read_gid_l2_fields(ah_attr->grh.sgid_attr,
 					      &ah->av.vlan_id, NULL);
 		if (ret)
 			return ret;
 
-		if (ah->av.vlan_id < VLAN_N_VID) {
-			ah->av.vlan_en = 1;
-			ah->av.vlan_id |= (rdma_ah_get_sl(ah_attr) & VLAN_SL_MASK) <<
-					  VLAN_SL_SHIFT;
-		}
+		ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
 	}
 
 	return ret;