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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 76835C3526F for ; Sat, 19 Dec 2020 13:00:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A67B23B17 for ; Sat, 19 Dec 2020 13:00:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728531AbgLSNAw (ORCPT ); Sat, 19 Dec 2020 08:00:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:47090 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728328AbgLSM7v (ORCPT ); Sat, 19 Dec 2020 07:59:51 -0500 From: Greg Kroah-Hartman Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann , Jakub Kicinski Subject: [PATCH 5.9 29/49] ch_ktls: fix build warning for ipv4-only config Date: Sat, 19 Dec 2020 13:58:33 +0100 Message-Id: <20201219125346.104892973@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201219125344.671832095@linuxfoundation.org> References: <20201219125344.671832095@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnd Bergmann [ Upstream commit a54ba3465d86fa5dd7d41bb88c0b5e71fb3b627e ] When CONFIG_IPV6 is disabled, clang complains that a variable is uninitialized for non-IPv4 data: drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:1046:6: error: variable 'cntrl1' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] if (tx_info->ip_family == AF_INET) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c:1059:2: note: uninitialized use occurs here cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) | ^~~~~~ Replace the preprocessor conditional with the corresponding C version, and make the ipv4 case unconditional in this configuration to improve readability and avoid the warning. Fixes: 86716b51d14f ("ch_ktls: Update cheksum information") Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20201203222641.964234-1-arnd@kernel.org Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/chelsio/chcr_ktls.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) --- a/drivers/crypto/chelsio/chcr_ktls.c +++ b/drivers/crypto/chelsio/chcr_ktls.c @@ -921,9 +921,7 @@ chcr_ktls_write_tcp_options(struct chcr_ struct fw_eth_tx_pkt_wr *wr; struct cpl_tx_pkt_core *cpl; u32 ctrl, iplen, maclen; -#if IS_ENABLED(CONFIG_IPV6) struct ipv6hdr *ip6; -#endif unsigned int ndesc; struct tcphdr *tcp; int len16, pktlen; @@ -971,17 +969,15 @@ chcr_ktls_write_tcp_options(struct chcr_ cpl->len = htons(pktlen); memcpy(buf, skb->data, pktlen); - if (tx_info->ip_family == AF_INET) { + if (!IS_ENABLED(CONFIG_IPV6) || tx_info->ip_family == AF_INET) { /* we need to correct ip header len */ ip = (struct iphdr *)(buf + maclen); ip->tot_len = htons(pktlen - maclen); cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP); -#if IS_ENABLED(CONFIG_IPV6) } else { ip6 = (struct ipv6hdr *)(buf + maclen); ip6->payload_len = htons(pktlen - maclen - iplen); cntrl1 = TXPKT_CSUM_TYPE_V(TX_CSUM_TCPIP6); -#endif } cntrl1 |= T6_TXPKT_ETHHDR_LEN_V(maclen - ETH_HLEN) |