From patchwork Thu Mar 9 16:01:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 66974 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp387112wrd; Thu, 9 Mar 2023 08:30:45 -0800 (PST) X-Google-Smtp-Source: AK7set+isN4RnelzCbaUOoYp34FWggOk8dfv5gHPAfPOvRvMPe+d+klPKGx2K3LQqr4IAom8fxhW X-Received: by 2002:a05:6a21:6d9a:b0:be:a9c7:5d12 with SMTP id wl26-20020a056a216d9a00b000bea9c75d12mr24738735pzb.18.1678379444984; Thu, 09 Mar 2023 08:30:44 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678379444; cv=none; d=google.com; s=arc-20160816; b=VuYUNqZOGxMpal7ELzZU0mspf43wR3ft4+xryno4tLlV9ldFhbulNSRiTz4phIUHBu GzALYBRPlh1cRDFyc3PFcT3OnGeoXWy0KoXydcpcy80CksOcZsLDyiKQWU+cGD/smZtb 0GBYXkJLyUmNqBAL5aEGeLKRsbH4v5f5XELt0jwQfy4lCzCZgkw4mk1XGX7lzNVbNgzu By7/CODV9pLWWvv4WP3PFdJeXnT1ElkZQU8OY6nuZu8jvrEJ+GpzQxLpEfQcYYMOd5Ew G9S013USOp1iwaPFeo6hArFvYW+P7GqDz8h481Vy5nGXO633o1FeDWxwaJ53f6UHLUKc pg1g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:dkim-signature; bh=RWxZWY+4j2LC2Hx/5MOho9tKeaDUwd+4OyC3KjTGJWQ=; b=pQK+CrpDCaG11PthGh1MCZchGwCjs7dLBIdBnldSIPu8J3FxbpdgbxDF0f+YO2RGNq iJZfuj36l0sbplgySBKr8v0VNW6QxsQLJH4Js73jmsw1mH0tiWiP0+7I8r/Q8mP2N+G2 8GBtpGvDUJTJO3Nuv4wOg84JXAYZXNQ5A5Dun7Hcfi2l6ovwXOFjE/kh980Aj5MY3nzW 06DDHKTaSXV+5e/lGRdTQKbgu0VaO/J/tXTl4YDUqtVcJiqeklkXOS2UMpJ/u5wO0xes XC43k3O5y78fTa5b6D4tL2dX8F5N7TnY1bg+C5Orj0d0b75P6zwtHkbqMtqO8CGsfKtr 8mvQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=zd7cerjv; dkim=neutral (no key) header.i=@suse.de; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id b2-20020aa78ec2000000b005a919052520si6113146pfr.317.2023.03.09.08.30.32; Thu, 09 Mar 2023 08:30:44 -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; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=zd7cerjv; dkim=neutral (no key) header.i=@suse.de; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231382AbjCIQJk (ORCPT + 99 others); Thu, 9 Mar 2023 11:09:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231758AbjCIQCk (ORCPT ); Thu, 9 Mar 2023 11:02:40 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A677F4B7A; Thu, 9 Mar 2023 08:02:39 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 1943222168; Thu, 9 Mar 2023 16:02:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377758; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RWxZWY+4j2LC2Hx/5MOho9tKeaDUwd+4OyC3KjTGJWQ=; b=zd7cerjvtXSD5/ZFuxef9nGjxgvuTB582pMlonjx0j51ZWbIoghzyETfnBO1ogCSBHS+wF pm1m+RHKt5wLvznwnAxxdzXSslaqlGdNPM3JVLwcNZTk8QkCG+Twrifylhhs9YB9ESyzmb SnFqVtPrZfWNHQ4rLuWfMLE0Y/b6sag= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377758; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RWxZWY+4j2LC2Hx/5MOho9tKeaDUwd+4OyC3KjTGJWQ=; b=fqQaqd2BL8XzkymFmmW3qiWauivlafHo91dkqosAWz6s2bUBUVfZRkPtfULXf4jQdZUdCt px33SMNQ8sEdt7Cg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id AF17513A73; Thu, 9 Mar 2023 16:02:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id OMTAKR0DCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:37 +0000 From: Thomas Zimmermann To: deller@gmx.de, geert+renesas@glider.be, timur@kernel.org, rdunlap@infradead.org, paulus@samba.org, benh@kernel.crashing.org, linux@armlinux.org.uk, pjones@redhat.com, adaplas@gmail.com, s.hauer@pengutronix.de, shawnguo@kernel.org, mbroemme@libmpq.org, thomas@winischhofer.net, James.Bottomley@HansenPartnership.com, sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com, corbet@lwn.net Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Thomas Zimmermann Subject: [PATCH v2 083/101] fbdev/tgafb: Parse option string with struct option_iter Date: Thu, 9 Mar 2023 17:01:43 +0100 Message-Id: <20230309160201.5163-84-tzimmermann@suse.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230309160201.5163-1-tzimmermann@suse.de> References: <20230309160201.5163-1-tzimmermann@suse.de> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,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?1759908404759000753?= X-GMAIL-MSGID: =?utf-8?q?1759908404759000753?= Use struct option_iter to walk over the individual options in the driver's option string. Replaces the hand-written strsep() loop with a clean interface. The helpers for struct option_iter handle empty option strings and empty options transparently. The struct's _init and _release functions duplicate and release the option string's memory buffer as needed. Done in preparation of constifying the option string. Signed-off-by: Thomas Zimmermann --- drivers/video/fbdev/tgafb.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/video/fbdev/tgafb.c b/drivers/video/fbdev/tgafb.c index cf00b8a91bfb..0862d9a54aef 100644 --- a/drivers/video/fbdev/tgafb.c +++ b/drivers/video/fbdev/tgafb.c @@ -14,6 +14,7 @@ #include #include +#include #include #include #include @@ -1573,25 +1574,24 @@ static void tgafb_exit(void) } #ifndef MODULE -static int tgafb_setup(char *arg) +static int tgafb_setup(const char *arg) { + struct option_iter iter; char *this_opt; - if (arg && *arg) { - while ((this_opt = strsep(&arg, ","))) { - if (!*this_opt) - continue; - if (!strncmp(this_opt, "mode:", 5)) { - kfree(mode_option_buf); - mode_option_buf = kstrdup(this_opt, GFP_KERNEL); // ignore errors - mode_option = mode_option_buf; - } else - printk(KERN_ERR - "tgafb: unknown parameter %s\n", - this_opt); - } + option_iter_init(&iter, arg); + + while (option_iter_next(&iter, &this_opt)) { + if (!strncmp(this_opt, "mode:", 5)) { + kfree(mode_option_buf); + mode_option_buf = kstrdup(this_opt, GFP_KERNEL); // ignore errors + mode_option = mode_option_buf; + } else + printk(KERN_ERR "tgafb: unknown parameter %s\n", this_opt); } + option_iter_release(&iter); + return 0; } #endif /* !MODULE */