From patchwork Thu May 25 18:28:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hernan Vargas X-Patchwork-Id: 127500 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id B51C342B9E; Thu, 25 May 2023 20:31:23 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 201E142B71; Thu, 25 May 2023 20:31:20 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by mails.dpdk.org (Postfix) with ESMTP id 9426C40DDB; Thu, 25 May 2023 20:31:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685039477; x=1716575477; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9r+LnxEEMo4Esmx/TnzQjoZ1FeSXH0OvNJTc/Q9foKI=; b=IOJb4/PTchPaGWKcdAoLZWU3HB900+R8+9GRjDD49gWuaq5klgYTttae jyv1LrlhSg1feH3i6LjLOlMVcfzBzJ7zBG6TB/3yVx6yTlRLiyk1+rwuW oTlkX0x8gkbpQS1dt3WFmbVtwK+QiWjuWxAO2tqY1NfLz/RctX2e6EJVY +gtAdpNLw7fFrSZL76a1SYnuiRm6fp9obBzTCo8oRWtNbFOTTnofEWdHm ak84pMG7DPVNphKTZM4v6Ti6KBiQ1EMrLAwh4k5jrdFLl2+1MwMYzUDz2 gau38big3f1cnI09towSvfsP3A9i2lyTMA6Obo5jpMGxSw6h27UuP9fg5 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10721"; a="357236137" X-IronPort-AV: E=Sophos;i="6.00,191,1681196400"; d="scan'208";a="357236137" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 May 2023 11:29:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10721"; a="1035044074" X-IronPort-AV: E=Sophos;i="6.00,191,1681196400"; d="scan'208";a="1035044074" Received: from unknown (HELO csl-npg-qt0.la.intel.com) ([10.233.181.103]) by fmsmga005.fm.intel.com with ESMTP; 25 May 2023 11:29:17 -0700 From: Hernan Vargas To: dev@dpdk.org, maxime.coquelin@redhat.com, gakhil@marvell.com, trix@redhat.com Cc: nicolas.chautru@intel.com, qi.z.zhang@intel.com, Hernan Vargas , stable@dpdk.org Subject: [PATCH v2 1/6] baseband/fpga_5gnr_fec: fix possible div by zero Date: Thu, 25 May 2023 11:28:07 -0700 Message-Id: <20230525182812.152907-2-hernan.vargas@intel.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230525182812.152907-1-hernan.vargas@intel.com> References: <20230525182812.152907-1-hernan.vargas@intel.com> MIME-Version: 1.0 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 Add fix to have an early exit when z_c is zero to prevent a possible division by zero. Fixes: 44dc6faa796f ("baseband/fpga_5gnr_fec: add LDPC processing functions") Cc: stable@dpdk.org Signed-off-by: Hernan Vargas Reviewed-by: Maxime Coquelin --- drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c index f29565af8cca..99390c48160c 100644 --- a/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c +++ b/drivers/baseband/fpga_5gnr_fec/rte_fpga_5gnr_fec.c @@ -877,9 +877,11 @@ check_desc_error(uint32_t error_code) { static inline uint16_t get_k0(uint16_t n_cb, uint16_t z_c, uint8_t bg, uint8_t rv_index) { + uint16_t n = (bg == 1 ? N_ZC_1 : N_ZC_2) * z_c; if (rv_index == 0) return 0; - uint16_t n = (bg == 1 ? N_ZC_1 : N_ZC_2) * z_c; + if (z_c == 0) + return 0; if (n_cb == n) { if (rv_index == 1) return (bg == 1 ? K0_1_1 : K0_1_2) * z_c;