From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB83A8F54; Mon, 13 Oct 2025 15:13:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760368380; cv=none; b=hKBUUbb2Qxza8KHYNSEDA7REZ0is2L2ZOFk7QXL8uoXyiEp0eCQh5KDitz+2HznDLnTDAYy7wx4BgIKVn2l7gWVjGydoMwOSNCOQ5MByQXtzyrVbY0jvXc+A8fy3ORhfthXY/jn3ERfKDuLzeK0L5WW5X58Q/sJL7vOwmslilag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760368380; c=relaxed/simple; bh=Y9b2BjPwrDel7+3z1hDmTtKuVMElHeNC3SLI0/t6bQk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DIuewGO4E1+yR3d9X03PhIw9QGAgbNmfUv4hjXcbgTGww9oLSSYLPZQxs77e1Wl54DjoIWIHM+4Wc5GJuGa6CkjmqgZtd7GK4dzsae/g9cDujJEUf7eDn5YRe3SuesNs2tU2tS3/KSg/kk/iD3n6duvFxijdiCSNkCGHLxbXpDA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uHTPT/Yv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uHTPT/Yv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 471F7C4CEE7; Mon, 13 Oct 2025 15:13:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760368380; bh=Y9b2BjPwrDel7+3z1hDmTtKuVMElHeNC3SLI0/t6bQk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uHTPT/YvritLxJGDXvQiYTRRtPbHE59EhpBOJrEp+wEGqI0fczG0qvh+jUsqa6knT EheOttmVIiO0lBWKmnNpwGMyhWKFojOsXHjyySTLy5B+XLXA81HTlJauw8e/pDmkUd RY4beQxtaZH+/QtzrXGDrhJyhhjW5dZYOvEvig7M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Patrisious Haddad , Mark Bloch , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 6.12 107/262] RDMA/mlx5: Fix vport loopback forcing for MPV device Date: Mon, 13 Oct 2025 16:44:09 +0200 Message-ID: <20251013144329.980486659@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144326.116493600@linuxfoundation.org> References: <20251013144326.116493600@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Patrisious Haddad [ Upstream commit 08aae7860450c89eebbc6fd4d38416e53c7a33d2 ] Previously loopback for MPV was supposed to be permanently enabled, however other driver flows were able to over-ride that configuration and disable it. Add force_lb parameter that indicates that loopback should always be enabled which prevents all other driver flows from disabling it. Fixes: a9a9e68954f2 ("RDMA/mlx5: Fix vport loopback for MPV device") Link: https://patch.msgid.link/r/cfc6b1f0f99f8100b087483cc14da6025317f901.1755088808.git.leon@kernel.org Signed-off-by: Patrisious Haddad Reviewed-by: Mark Bloch Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/main.c | 19 +++++++++++++++---- drivers/infiniband/hw/mlx5/mlx5_ib.h | 1 + 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 29d0bc583169b..f3e58797705d7 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1813,7 +1813,8 @@ static void deallocate_uars(struct mlx5_ib_dev *dev, } static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master, - struct mlx5_core_dev *slave) + struct mlx5_core_dev *slave, + struct mlx5_ib_lb_state *lb_state) { int err; @@ -1825,6 +1826,7 @@ static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master, if (err) goto out; + lb_state->force_enable = true; return 0; out: @@ -1833,16 +1835,22 @@ static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master, } static void mlx5_ib_disable_lb_mp(struct mlx5_core_dev *master, - struct mlx5_core_dev *slave) + struct mlx5_core_dev *slave, + struct mlx5_ib_lb_state *lb_state) { mlx5_nic_vport_update_local_lb(slave, false); mlx5_nic_vport_update_local_lb(master, false); + + lb_state->force_enable = false; } int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp) { int err = 0; + if (dev->lb.force_enable) + return 0; + mutex_lock(&dev->lb.mutex); if (td) dev->lb.user_td++; @@ -1864,6 +1872,9 @@ int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp) void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev, bool td, bool qp) { + if (dev->lb.force_enable) + return; + mutex_lock(&dev->lb.mutex); if (td) dev->lb.user_td--; @@ -3521,7 +3532,7 @@ static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev, lockdep_assert_held(&mlx5_ib_multiport_mutex); - mlx5_ib_disable_lb_mp(ibdev->mdev, mpi->mdev); + mlx5_ib_disable_lb_mp(ibdev->mdev, mpi->mdev, &ibdev->lb); mlx5_core_mp_event_replay(ibdev->mdev, MLX5_DRIVER_EVENT_AFFILIATION_REMOVED, @@ -3618,7 +3629,7 @@ static bool mlx5_ib_bind_slave_port(struct mlx5_ib_dev *ibdev, MLX5_DRIVER_EVENT_AFFILIATION_DONE, &key); - err = mlx5_ib_enable_lb_mp(ibdev->mdev, mpi->mdev); + err = mlx5_ib_enable_lb_mp(ibdev->mdev, mpi->mdev, &ibdev->lb); if (err) goto unbind; diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 29bde64ea1eac..f49cb588a856d 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -1083,6 +1083,7 @@ struct mlx5_ib_lb_state { u32 user_td; int qps; bool enabled; + bool force_enable; }; struct mlx5_ib_pf_eq { -- 2.51.0