From: Dean Luick <dean.luick@cornelisnetworks.com>
Date: Mon, 9 Mar 2026 20:44:54 +0000 (-0400)
Subject: RDMA/rdmavt: Correct multi-port QP iteration
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fed679e0862b3abd706041be3cc7620318fbee8;p=thirdparty%2Flinux.git

RDMA/rdmavt: Correct multi-port QP iteration

When finding special QPs, the iterator makes an incorrect port
index calculation.  Fix the calculation.

Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://patch.msgid.link/177308909468.1279894.5073405674644246445.stgit@awdrv-04.cornelisnetworks.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
---

diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c
index c1199ea5d41f..b519d9d0e429 100644
--- a/drivers/infiniband/sw/rdmavt/qp.c
+++ b/drivers/infiniband/sw/rdmavt/qp.c
@@ -2707,7 +2707,7 @@ int rvt_qp_iter_next(struct rvt_qp_iter *iter)
 				struct rvt_ibport *rvp;
 				int pidx;
 
-				pidx = n % rdi->ibdev.phys_port_cnt;
+				pidx = n / 2; /* QP0 and QP1 */
 				rvp = rdi->ports[pidx];
 				qp = rcu_dereference(rvp->qp[n & 1]);
 			} else {