From patchwork Sat Aug 3 04:26:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 13752146 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 D61AF12B17C; Sat, 3 Aug 2024 04:26:52 +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=1722659213; cv=none; b=T4zReXtwWQa1YAgsgcQ+8g1+Ttc9Y4Cx27gHkVPItweMfFr8LEIcymyEknOfGCB4IyJZUV010q8fLbTxN16NBjqeWNP2+mWcGGxa2VTri6yIfms9vWNhytT6oOhL7SqTrEB5SrX6l2shOZXmRz4SYNS2NNyLfRJYWZrhrWoSnIM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722659213; c=relaxed/simple; bh=87XPti6RVqAiNW3eWPIQm2vFmmfDS6ddZiot77zPsWk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rMhk+QXvFkF12DG3AyKygWKaNl29eLechvBitwWYpMM+X7yJLZa5Nh7JXY5x21gw4euOMIManmC5IL490TrG/IDQRi48B0vFVJrQCGwa1yuMrnSAqb2Zr10e8dwxtkBhgpXGFLlBABjE+1eV2fpMwEmyU/z6QYtZxdK4SZ91Ku4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lfzI7yBB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lfzI7yBB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB107C4AF12; Sat, 3 Aug 2024 04:26:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722659212; bh=87XPti6RVqAiNW3eWPIQm2vFmmfDS6ddZiot77zPsWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lfzI7yBBXFi14uuqoXT2SPOZQKetjPQPCMd4+gd5Q3WC6ez5YSidNSl8yBCsZ51By PdZn6dY5jJb6x0UZFls96PDCicx5veh2NYHDX8ooZxrGz3uaCQs+UMKL4iMv/R58Ax BKwVDTQE7RKthSgfhnRNTd0suBqiIVlqNGKu4yV4EYHn36kMjCUfFNG9Q+jPTyVaQb 9TqeBvyj/aAdcmW/l7ON2A7uAEjkGLU09FF11D90jREAzHtmwxhxruZ+NZ1lGNrD5r p+yUG2LB3CaxmJRSYGzQ20kgmUon1mn1VG5/sqCS6thGN0FGA+BgBXquSEbhdI5SMZ xuF959SmiNp5g== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, dxu@dxuuu.xyz, ecree.xilinx@gmail.com, przemyslaw.kitszel@intel.com, donald.hunter@gmail.com, gal.pressman@linux.dev, tariqt@nvidia.com, willemdebruijn.kernel@gmail.com, jdamato@fastly.com, Jakub Kicinski , saeedm@nvidia.com, leon@kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH net-next v2 03/12] eth: mlx5: allow disabling queues when RSS contexts exist Date: Fri, 2 Aug 2024 21:26:15 -0700 Message-ID: <20240803042624.970352-4-kuba@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240803042624.970352-1-kuba@kernel.org> References: <20240803042624.970352-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since commit 24ac7e544081 ("ethtool: use the rss context XArray in ring deactivation safety-check") core will prevent queues from being disabled while being used by additional RSS contexts. The safety check is no longer necessary, and core will do a more accurate job of only rejecting changes which can actually break things. Reviewed-by: Joe Damato Signed-off-by: Jakub Kicinski Reviewed-by: Gal Pressman --- CC: saeedm@nvidia.com CC: tariqt@nvidia.com CC: leon@kernel.org CC: linux-rdma@vger.kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c index 36845872ae94..0b941482db30 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c @@ -445,7 +445,6 @@ int mlx5e_ethtool_set_channels(struct mlx5e_priv *priv, unsigned int count = ch->combined_count; struct mlx5e_params new_params; bool arfs_enabled; - int rss_cnt; bool opened; int err = 0; @@ -499,17 +498,6 @@ int mlx5e_ethtool_set_channels(struct mlx5e_priv *priv, goto out; } - /* Don't allow changing the number of channels if non-default RSS contexts exist, - * the kernel doesn't protect against set_channels operations that break them. - */ - rss_cnt = mlx5e_rx_res_rss_cnt(priv->rx_res) - 1; - if (rss_cnt) { - err = -EINVAL; - netdev_err(priv->netdev, "%s: Non-default RSS contexts exist (%d), cannot change the number of channels\n", - __func__, rss_cnt); - goto out; - } - /* Don't allow changing the number of channels if MQPRIO mode channel offload is active, * because it defines a partition over the channels queues. */