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 7E94924466C; Mon, 13 Oct 2025 15:00:24 +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=1760367624; cv=none; b=qccevNh91w9LQQ1+7Dx9zd9nlpkvBFSnD0AcN1529gz17w871Mcd3RWyl4KkwTfVEuCcoWgTI3XRQEL+Qmm0AUA0m8zJW/i8ytkAtI79VCfihr6q0Jnz30ImFbsbvZlZYHWxOEKNBEyTPhCHJCk+7KhtGwlmmKI1YbSqlniKPfU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760367624; c=relaxed/simple; bh=/HRHDQefdWQZ7vSqPisilLq8614DubqZFR9TirJ8TmM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B+32rRQAYLumHbhP6E5ty1vEGpGsQFvE8ynBeHqbkE8SYcWWEr+FJl/xXDltfkYst+f9tkgRECouNrR4icLNnESHYqChzUiXfLt9dpNfCcv9VCTNCzePc22aJv9IWPnZTnm3rWaOxljCAnuDsUhU3W5YhUGfJkhmEp/NhYdZ4C0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bppjVgq1; 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="bppjVgq1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02C7DC4CEFE; Mon, 13 Oct 2025 15:00:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760367624; bh=/HRHDQefdWQZ7vSqPisilLq8614DubqZFR9TirJ8TmM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bppjVgq1E3ar+qERN96l75Wmqy02ew307WCrJ3P6t1EXmxDZJyqxuULbB6WZQSSGI p8sBQWUs6j1Ly9MpheqjmSDDAHS2SD027wV1qne7BUkAIPJc5mn8FQynm/RtxppVdV CgwRh9intUOfnJBjXefxiYDkhntwKrx1E3SS702k= 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 6.6 077/196] RDMA/mlx5: Fix vport loopback forcing for MPV device Date: Mon, 13 Oct 2025 16:44:28 +0200 Message-ID: <20251013144318.102579845@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144315.184275491@linuxfoundation.org> References: <20251013144315.184275491@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-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 e922fb8728654..0adb98b8dacc8 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1691,7 +1691,8 @@ 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; @@ -1703,6 +1704,7 @@ static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master, if (err) goto out; + lb_state->force_enable = true; return 0; out: @@ -1711,16 +1713,22 @@ 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++; @@ -1742,6 +1750,9 @@ 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--; @@ -3251,7 +3262,7 @@ 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, @@ -3348,7 +3359,7 @@ 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 94678e5c59dd5..9b780f48a382b 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -1065,6 +1065,7 @@ struct mlx5_ib_lb_state { u32 user_td; int qps; bool enabled; + bool force_enable; }; struct mlx5_ib_pf_eq { -- 2.51.0