From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 478DC488FF; Fri, 10 Oct 2025 14:59:15 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id BCD4B4027A; Fri, 10 Oct 2025 14:59:14 +0200 (CEST) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) by mails.dpdk.org (Postfix) with ESMTP id 3D4F54026F; Fri, 10 Oct 2025 14:59:12 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1760101154; x=1791637154; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=d7chTzzdoNxLQ9YpB2SSQsxF6SH5RknjlOaIY+fhVbA=; b=YdS8yPaCFdAviHXIrwFvQ+lq75ovSF6wHx+l5vUIUIt3pObpmUmFNdkl Foy3c2rKnaAniha4WCueZbJYoOLDnq1ZFR22eQ29PZ1Ek1HrsEgNLko++ yqRRIaSt8SBy4WZBQU2pkMNxCdJ7jPGS8uiYLSNP5B6uGIAuOhG2k0rFC n5Rn+/5NdJhTnvt9c576ElhWxLjeXMjQ6c90Ik4feIyk8r7Csr/X016Xl abLZrk+G3CTwMY1FFy7I16C+xXDFD5UZp+Es5wy2V3YGJUoYiSrZODVC2 1gVFWJ6DMEwn2DNNR471hayYnyVVF+eWKxK1qwXughwraDphGL8ZbEDQ2 w==; X-CSE-ConnectionGUID: nAKI+5reQ7+oOx3RYBkDIw== X-CSE-MsgGUID: Hzkg/dUCQ4uTqGUM1P0tzw== X-IronPort-AV: E=McAfee;i="6800,10657,11578"; a="62418712" X-IronPort-AV: E=Sophos;i="6.19,219,1754982000"; d="scan'208";a="62418712" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2025 05:59:12 -0700 X-CSE-ConnectionGUID: nabOXUVtRtGRUNa+GZ6whw== X-CSE-MsgGUID: NtE3qooVTWiVxQgdt1Xg0A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,219,1754982000"; d="scan'208";a="211625522" Received: from silpixa00401177.ir.intel.com ([10.20.224.214]) by orviesa002.jf.intel.com with ESMTP; 10 Oct 2025 05:59:10 -0700 From: Ciara Loftus To: dev@dpdk.org Cc: thierry.herbelot@6wind.com, bruce.richardson@intel.com, Ciara Loftus , stable@dpdk.org Subject: [PATCH] net/e1000: fix crash when built with GCC 13 Date: Fri, 10 Oct 2025 12:58:48 +0000 Message-Id: <20251010125848.965340-1-ciara.loftus@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The e1000 PMD crashes during initialisation in a Ubuntu 24.04 VM when compiled with gcc-13 with -O3 optimisations. This patch introduces a compiler barrier after the register read that was causing the issue. Bugzilla ID: 1691 Fixes: af75078fece3 ("first public release") Cc: stable@dpdk.org Signed-off-by: Ciara Loftus --- drivers/net/intel/e1000/base/e1000_mac.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/intel/e1000/base/e1000_mac.c b/drivers/net/intel/e1000/base/e1000_mac.c index 2fa97d12a9..41aae86ffe 100644 --- a/drivers/net/intel/e1000/base/e1000_mac.c +++ b/drivers/net/intel/e1000/base/e1000_mac.c @@ -1842,6 +1842,7 @@ s32 e1000_id_led_init_generic(struct e1000_hw *hw) return ret_val; mac->ledctl_default = E1000_READ_REG(hw, E1000_LEDCTL); + rte_compiler_barrier(); mac->ledctl_mode1 = mac->ledctl_default; mac->ledctl_mode2 = mac->ledctl_default; -- 2.34.1