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[2620:137:e000::1:20]) by mx.google.com with ESMTP id mh3-20020a17090b4ac300b00218792fa2b3si3931121pjb.160.2023.01.18.23.44.59; Wed, 18 Jan 2023 23:45:11 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230002AbjASHnx (ORCPT + 99 others); Thu, 19 Jan 2023 02:43:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230092AbjASHmr (ORCPT ); Thu, 19 Jan 2023 02:42:47 -0500 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DAA45654DB; Wed, 18 Jan 2023 23:42:35 -0800 (PST) Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.77 with qID 30J7gG4k9008303, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36505.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.81/5.90) with ESMTPS id 30J7gG4k9008303 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 19 Jan 2023 15:42:16 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36505.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.32; Thu, 19 Jan 2023 15:42:17 +0800 Received: from fc34.localdomain (172.22.228.98) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Thu, 19 Jan 2023 15:42:16 +0800 From: Hayes Wang To: , CC: , , , , , , Hayes Wang Subject: [PATCH net-next 2/2] r8152: reduce the control transfer of rtl8152_get_version() Date: Thu, 19 Jan 2023 15:40:43 +0800 Message-ID: <20230119074043.10021-399-nic_swsd@realtek.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230119074043.10021-397-nic_swsd@realtek.com> References: <20230119074043.10021-397-nic_swsd@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.22.228.98] X-ClientProxiedBy: RTEXH36505.realtek.com.tw (172.21.6.25) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: trusted connection X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 01/19/2023 07:27:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIzLzEvMTkgpFekyCAwNjow?= =?big5_tw?b?MDowMA==?= X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-ServerInfo: RTEXH36505.realtek.com.tw, 9 X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755436088282994787?= X-GMAIL-MSGID: =?utf-8?q?1755436088282994787?= Reduce the control transfer by moving calling rtl8152_get_version() in rtl8152_probe(). This could prevent from calling rtl8152_get_version() for unnecessary situations. For example, after setting config #2 for the device, there are two interfaces and rtl8152_probe() may be called twice. However, we don't need to call rtl8152_get_version() for this situation. Signed-off-by: Hayes Wang --- drivers/net/usb/r8152.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 6e5e12d90d47..decb5ba56a25 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -9581,20 +9581,21 @@ static int rtl8152_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(intf); - u8 version = rtl8152_get_version(intf); struct r8152 *tp; struct net_device *netdev; + u8 version; int ret; - if (version == RTL_VER_UNKNOWN) - return -ENODEV; - if (intf->cur_altsetting->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC) return -ENODEV; if (!rtl_check_vendor_ok(intf)) return -ENODEV; + version = rtl8152_get_version(intf); + if (version == RTL_VER_UNKNOWN) + return -ENODEV; + usb_reset_device(udev); netdev = alloc_etherdev(sizeof(struct r8152)); if (!netdev) {