From patchwork Mon Jan 24 17:31:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 12722520 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 374D5C433FE for ; Mon, 24 Jan 2022 17:33:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244657AbiAXRdH (ORCPT ); Mon, 24 Jan 2022 12:33:07 -0500 Received: from mga05.intel.com ([192.55.52.43]:34775 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244641AbiAXRdE (ORCPT ); Mon, 24 Jan 2022 12:33:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643045584; x=1674581584; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F4h1rZCbd2h5IDu/b6Bx1veFO7oqf0n33MOXfWPn0Gc=; b=SCTOUVpGM2KbPh8GM+bo1h4LebQvzakGhqV6+RHmtL9hIcSCjSjlCioj XIlyRApEywMan5c/BJMcZaCmQkmfpnZpYVWskvG+jjJ0BM7wiyO9Ho8Ei /lQKeiRvQ2PaJbShz9ApqcGBpTYA8b9fFciSQbchqyLO2ahEmAR8CsOZf T4OnJC2DGeowQ5nIiLw73+9oLRXDMddu+GNoq/FocHEG7m9TEsskdvvOl BLY+tfWy0/kwYkhOe/DUfkkRPI3gUbLOpylKQthD0dhoSvoH/u+G5dkke 2B1aFZ5UlfFeXH9bA339MkcqGVOwOnialf0DcBOMSilrLnTJA2YeakYzt Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10236"; a="332455455" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="332455455" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 09:33:03 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="624155622" Received: from irvmail001.ir.intel.com ([10.43.11.63]) by fmsmga002.fm.intel.com with ESMTP; 24 Jan 2022 09:33:01 -0800 Received: from newjersey.igk.intel.com (newjersey.igk.intel.com [10.102.20.203]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 20OHWuIq010465; Mon, 24 Jan 2022 17:32:58 GMT From: Alexander Lobakin To: intel-wired-lan@lists.osuosl.org Cc: Alexander Lobakin , Jesse Brandeburg , Maciej Fijalkowski , Michal Swiatkowski , Martyna Szapar-Mudlaw , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 2/4] ice: switch: unobscurify bitops loop in ice_fill_adv_dummy_packet() Date: Mon, 24 Jan 2022 18:31:13 +0100 Message-Id: <20220124173116.739083-3-alexandr.lobakin@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124173116.739083-1-alexandr.lobakin@intel.com> References: <20220124173116.739083-1-alexandr.lobakin@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org A loop performing header modification according to the provided mask in ice_fill_adv_dummy_packet() is very cryptic (and error-prone). Replace two identical cast-deferences with a variable. Replace three struct-member-array-accesses with a variable. Invert the condition, reduce the indentation by one -> eliminate line wraps. Signed-off-by: Alexander Lobakin --- drivers/net/ethernet/intel/ice/ice_switch.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c index 3056ae85711a..834ac8eebfaa 100644 --- a/drivers/net/ethernet/intel/ice/ice_switch.c +++ b/drivers/net/ethernet/intel/ice/ice_switch.c @@ -5187,13 +5187,15 @@ ice_fill_adv_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt, * indicated by the mask to make sure we don't improperly write * over any significant packet data. */ - for (j = 0; j < len / sizeof(u16); j++) - if (lkups[i].m_raw[j]) - ((u16 *)(pkt + offset))[j] = - (((u16 *)(pkt + offset))[j] & - ~lkups[i].m_raw[j]) | - (lkups[i].h_raw[j] & - lkups[i].m_raw[j]); + for (j = 0; j < len / sizeof(u16); j++) { + u16 *ptr = (u16 *)(pkt + offset); + u16 mask = lkups[i].m_raw[j]; + + if (!mask) + continue; + + ptr[j] = (ptr[j] & ~mask) | (lkups[i].h_raw[j] & mask); + } } s_rule->pdata.lkup_tx_rx.hdr_len = cpu_to_le16(pkt_len);