[PATCH] RDMA/rtrs-clt: Don't WARN on unexpected info-response opcode

[Quanye Yang via B4 Relay]

From: Quanye Yang <quanyeyang@xxxxxxxxx>

The info-response receive is posted for a SEND.  The completion
opcode comes from the peer, so RDMA WRITE with Immediate is a
legal WC on that WQE even though it violates the RTRS handshake.

WARN_ON(wc->opcode != IB_WC_RECV) treats that peer-controlled
field as an internal invariant and panics with panic_on_warn.
Treat a non-SEND completion as a handshake failure: log it and
keep the existing CONNECTING_ERR cleanup.

Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality")
Reported-by: Farhad Alemi <farhad.alemi@xxxxxxxxxxxx>
Link: https://lore.kernel.org/linux-rdma/CA+0ovCge-K+hcGHXZ4R3Ww5+cg159uxHBeVbKeUSLBRSMT8OWA@xxxxxxxxxxxxxx
Signed-off-by: Quanye Yang <quanyeyang@xxxxxxxxx>
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index eac38b57b00d..3c23c27725a5 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -2514,7 +2514,12 @@ static void rtrs_clt_info_rsp_done(struct ib_cq *cq, struct ib_wc *wc)
 			  ib_wc_status_msg(wc->status));
 		goto out;
 	}
-	WARN_ON(wc->opcode != IB_WC_RECV);
+	if (wc->opcode != IB_WC_RECV) {
+		rtrs_err(clt_path->clt,
+			 "Path info response has unexpected opcode %d\n",
+			 wc->opcode);
+		goto out;
+	}
 
 	if (wc->byte_len < sizeof(*msg)) {
 		rtrs_err(clt_path->clt, "Path info response is malformed: size %d\n",

---
base-commit: 93f51579e7df248780214094418f205253383cc5
change-id: 20260921-rtrs-fix-rtrs-clt-info-rsp-done-3e5d47cfdc44

Best regards,
--  
Quanye Yang <quanyeyang@xxxxxxxxx>