4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Honggang LI <honggangli@xxxxxxx>
[ Upstream commit 4adcaf969d77d3d3aa3871bbadc196258a38aec6 ]
BTH_ACK_MASK bit is used to indicate that an acknowledge
(for this packet) should be scheduled by the responder.
Both UC and UD QPs are unacknowledged, so don't set
BTH_ACK_MASK for UC or UD QPs.
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Signed-off-by: Honggang LI <honggangli@xxxxxxx>
Link: https://lore.kernel.org/r/20240624020348.494338-1-honggangli@xxxxxxx
Reviewed-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/sw/rxe/rxe_req.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index 4008ab2da0526..aa57a9cb53886 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -390,7 +390,7 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
int solicited;
u16 pkey;
u32 qp_num;
- int ack_req;
+ int ack_req = 0;
/* length from start of bth to end of icrc */
paylen = rxe_opcode[opcode].length + payload + pad + RXE_ICRC_SIZE;
@@ -426,8 +426,9 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
qp_num = (pkt->mask & RXE_DETH_MASK) ? ibwr->wr.ud.remote_qpn :
qp->attr.dest_qp_num;
- ack_req = ((pkt->mask & RXE_END_MASK) ||
- (qp->req.noack_pkts++ > RXE_MAX_PKT_PER_ACK));
+ if (qp_type(qp) != IB_QPT_UD && qp_type(qp) != IB_QPT_UC)
+ ack_req = ((pkt->mask & RXE_END_MASK) ||
+ (qp->req.noack_pkts++ > RXE_MAX_PKT_PER_ACK));
if (ack_req)
qp->req.noack_pkts = 0;
--
2.43.0
