[PATCH 5.10 216/717] RDMA/hns: Avoid setting loopback indicator when smac is same as dmac

Greg Kroah-Hartman
2020-12-28T14:11:33Z

From: Weihang Li <liweihang@huawei.com>

[ Upstream commit 3631dadfb118821236098a215e59fb5d3e1c30a8 ]

The loopback flag will be set to 1 by the hardware when the source mac
address is same as the destination mac address. So the driver don't need
to compare them.

Fixes: d6a3627e311c ("RDMA/hns: Optimize wqe buffer set flow for post send")
Link: https://lore.kernel.org/r/1605526408-6936-4-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 9 ---------
1 file changed, 9 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index d127e0e4c3cda..4db7eea3dcec5 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -433,8 +433,6 @@ static inline int set_ud_wqe(struct hns_roce_qp *qp,
unsigned int curr_idx = *sge_idx;
int valid_num_sge;
u32 msg_len = 0;
- bool loopback;
- u8 *smac;
int ret;

valid_num_sge = calc_wr_sge_num(wr, &msg_len);
@@ -457,13 +455,6 @@ static inline int set_ud_wqe(struct hns_roce_qp *qp,
roce_set_field(ud_sq_wqe->byte_48, V2_UD_SEND_WQE_BYTE_48_DMAC_5_M,
V2_UD_SEND_WQE_BYTE_48_DMAC_5_S, ah->av.mac[5]);

- /* MAC loopback */
- smac = (u8 *)hr_dev->dev_addr[qp->port];
- loopback = ether_addr_equal_unaligned(ah->av.mac, smac) ? 1 : 0;
-
- roce_set_bit(ud_sq_wqe->byte_40,
- V2_UD_SEND_WQE_BYTE_40_LBI_S, loopback);
-
ud_sq_wqe->msg_len = cpu_to_le32(msg_len);

/* Set sig attr */
--
2.27.0