From patchwork Thu Mar 9 16:00:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 662253 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 06961C74A5B for ; Thu, 9 Mar 2023 16:03:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231824AbjCIQDR (ORCPT ); Thu, 9 Mar 2023 11:03:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231538AbjCIQCS (ORCPT ); Thu, 9 Mar 2023 11:02:18 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3BBD7F6C7A; Thu, 9 Mar 2023 08:02:13 -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 EC80A2214B; Thu, 9 Mar 2023 16:02:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377731; 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=yiri3tc/a1MXdsd+j79tZAwP26XU744YZButEfhgQbE=; b=070go3KipUxMIObSkyt1ar879i99/CaFVQa+B8/HlgVXaI5PIj5+RV5jgjrZfjZRDwt+Je ZOMRUVB0EvGdDZpRLn9DV0BNp4+e71kmvf7kV8QglGKDREyZ7UfD2dYh4jEuvUI1uI3syu 54KWh7ePUe630ooMf+Q2v4GlzhzNhn0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377731; 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=yiri3tc/a1MXdsd+j79tZAwP26XU744YZButEfhgQbE=; b=bmV9xsaxTmBlD4rVnIpNT+ss9CvC4ALPa0sCOYGgaIMlK7ZMQkkgWY/vrMx+aAFqnVNsxX hbjPh4XgwBi2uODw== 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 8CEA11391B; Thu, 9 Mar 2023 16:02:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id iC2DIQMDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:11 +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 018/101] fbdev/controlfb: Parse option string with struct option_iter Date: Thu, 9 Mar 2023 17:00:38 +0100 Message-Id: <20230309160201.5163-19-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 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 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/controlfb.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c index 82eeb139c4eb..65e2f9949420 100644 --- a/drivers/video/fbdev/controlfb.c +++ b/drivers/video/fbdev/controlfb.c @@ -31,6 +31,7 @@ * more details. */ +#include #include #include #include @@ -795,14 +796,14 @@ static void __init control_init_info(struct fb_info *info, struct fb_info_contro /* * Parse user specified options (`video=controlfb:') */ -static void __init control_setup(char *options) +static void __init control_setup(const char *options) { + struct option_iter iter; char *this_opt; - if (!options || !*options) - return; + option_iter_init(&iter, options); - while ((this_opt = strsep(&options, ",")) != NULL) { + while (option_iter_next(&iter, &this_opt)) { if (!strncmp(this_opt, "vmode:", 6)) { int vmode = simple_strtoul(this_opt+6, NULL, 0); if (vmode > 0 && vmode <= VMODE_MAX && @@ -830,6 +831,8 @@ static void __init control_setup(char *options) } } } + + option_iter_release(&iter); } /*