From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67915C35254 for ; Wed, 5 Feb 2020 12:06:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3F646217BA for ; Wed, 5 Feb 2020 12:06:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727711AbgBEMGb (ORCPT ); Wed, 5 Feb 2020 07:06:31 -0500 Received: from mga14.intel.com ([192.55.52.115]:56042 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726575AbgBEMG2 (ORCPT ); Wed, 5 Feb 2020 07:06:28 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Feb 2020 04:06:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,405,1574150400"; d="scan'208";a="254742602" Received: from ranger.igk.intel.com ([10.102.21.164]) by fmsmga004.fm.intel.com with ESMTP; 05 Feb 2020 04:06:26 -0800 From: Maciej Fijalkowski To: ast@kernel.org, daniel@iogearbox.net Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, bjorn.topel@intel.com, magnus.karlsson@intel.com, maximmi@mellanox.com Subject: [PATCH bpf 1/3] i40e: Relax i40e_xsk_wakeup's return value when PF is busy Date: Wed, 5 Feb 2020 05:58:32 +0100 Message-Id: <20200205045834.56795-2-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200205045834.56795-1-maciej.fijalkowski@intel.com> References: <20200205045834.56795-1-maciej.fijalkowski@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Return -EAGAIN instead of -ENETDOWN to provide a slightly milder information to user space so that an application will know to retry the syscall when __I40E_CONFIG_BUSY bit is set on pf->state. Fixes: b3873a5be757 ("net/i40e: Fix concurrency issues between config flow and XSK") Acked-by: Björn Töpel Signed-off-by: Maciej Fijalkowski --- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index 42058fad6..0b7d29192 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -791,7 +791,7 @@ int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags) struct i40e_ring *ring; if (test_bit(__I40E_CONFIG_BUSY, pf->state)) - return -ENETDOWN; + return -EAGAIN; if (test_bit(__I40E_VSI_DOWN, vsi->state)) return -ENETDOWN; -- 2.20.1