From patchwork Mon Mar 6 16:00:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 660147 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 05ABAC76196 for ; Mon, 6 Mar 2023 16:02:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229988AbjCFQCZ (ORCPT ); Mon, 6 Mar 2023 11:02:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231534AbjCFQBK (ORCPT ); Mon, 6 Mar 2023 11:01:10 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A8FD32E58; Mon, 6 Mar 2023 08:01:03 -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 BB3BB22461; Mon, 6 Mar 2023 16:01:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678118461; 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=hBXQKYm2hwrIwZ4Y9UCOS67Q8TAQ+vGWXSDQRXHtNhc=; b=lJKTCD/WkcNYmZcY9jTjFh4dh4nexnA6fZYSMd2FXhI8VEExrA31xcfu6sLhx0cbPbO5XC MT2x6Ay7AdH6Ig3Ok40g6nyOSzSVBBJm4A7DuIagaOeDwdnorjnsPWwfR/hXEyMkOHZCjD JKsjU5HN9urjGFivrJOIsujXg4OllaE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678118461; 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=hBXQKYm2hwrIwZ4Y9UCOS67Q8TAQ+vGWXSDQRXHtNhc=; b=FWT2P+1YsMeg6ZH2ng/TlropyQSDKfG/VjgGc9g6/aefVAQF04kUk3tGoX2oF0tj0gwxPr w+4J3U1BCwIwfmCQ== 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 5EC2813A6A; Mon, 6 Mar 2023 16:01:01 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id IMI5Fj0OBmQ/PwAAMHmgww (envelope-from ); Mon, 06 Mar 2023 16:01:01 +0000 From: Thomas Zimmermann To: deller@gmx.de, paulus@samba.org, benh@kernel.crashing.org, linux@armlinux.org.uk, pjones@redhat.com, timur@kernel.org, adaplas@gmail.com, s.hauer@pengutronix.de, shawnguo@kernel.org, mbroemme@libmpq.org, thomas@winischhofer.net, James.Bottomley@HansenPartnership.com, spock@gentoo.org, sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com, geert+renesas@glider.be, corbet@lwn.net Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Thomas Zimmermann Subject: [PATCH 96/99] fbdev/viafb: Parse option string with struct option_iter Date: Mon, 6 Mar 2023 17:00:13 +0100 Message-Id: <20230306160016.4459-97-tzimmermann@suse.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230306160016.4459-1-tzimmermann@suse.de> References: <20230306160016.4459-1-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/via/viafbdev.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/video/fbdev/via/viafbdev.c b/drivers/video/fbdev/via/viafbdev.c index 2d67c92c5774..4f39319e21f8 100644 --- a/drivers/video/fbdev/via/viafbdev.c +++ b/drivers/video/fbdev/via/viafbdev.c @@ -5,6 +5,7 @@ */ +#include #include #include #include @@ -1922,21 +1923,18 @@ void via_fb_pci_remove(struct pci_dev *pdev) #ifndef MODULE static int __init viafb_setup(void) { - char *this_opt; char *options; + struct option_iter iter; + const char *this_opt; DEBUG_MSG(KERN_INFO "viafb_setup!\n"); if (fb_get_options("viafb", &options)) return -ENODEV; - if (!options || !*options) - return 0; - - while ((this_opt = strsep(&options, ",")) != NULL) { - if (!*this_opt) - continue; + option_iter_init(&iter, options); + while (option_iter_next(&iter, this_opt)) { if (!strncmp(this_opt, "viafb_mode1=", 12)) { viafb_mode1 = kstrdup(this_opt + 12, GFP_KERNEL); if (!viafb_mode1) @@ -2009,6 +2007,9 @@ static int __init viafb_setup(void) return -ENOMEM; } } + + option_iter_release(&iter); + return 0; } #endif