From patchwork Mon Mar 6 15:59:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 660177 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 95441C77B76 for ; Mon, 6 Mar 2023 16:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231497AbjCFQBE (ORCPT ); Mon, 6 Mar 2023 11:01:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230126AbjCFQAk (ORCPT ); Mon, 6 Mar 2023 11:00:40 -0500 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F5922E820; Mon, 6 Mar 2023 08:00:39 -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-out2.suse.de (Postfix) with ESMTPS id 04C031FE14; Mon, 6 Mar 2023 16:00:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678118438; 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=u1Vj2hdFriPuAq6eu7C8YZHRTaIjSTKM0OUYtVPbUzk=; b=NVJcM5+tIjVKP36P2s61a81geLBT2XVpk0f49JGUpN36gKTy2EJ9npfGm04wJi6oNyABMQ bOhMpWxD8/HPl7I1+8n3/+4XfiUd87dBUrEYjiShSTB0DDjVwb6hbnlpxrTokTc9mqxDhO 5pFEn7NRrp51TH6y5EEhomLOiPfnclc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678118438; 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=u1Vj2hdFriPuAq6eu7C8YZHRTaIjSTKM0OUYtVPbUzk=; b=oUyTvCb7JB9J08x2nUAGyuDJaMojsQtB+ZHQlyLEJYFCPGhkHFN+qOwbnWxxDefF0hD8O8 uAfuSfArup44SOBA== 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 9C43313A6A; Mon, 6 Mar 2023 16:00:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id gA4kJSUOBmQ/PwAAMHmgww (envelope-from ); Mon, 06 Mar 2023 16:00:37 +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 36/99] fbdev/imsttfb: Parse option string with struct option_iter Date: Mon, 6 Mar 2023 16:59:13 +0100 Message-Id: <20230306160016.4459-37-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/imsttfb.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/video/fbdev/imsttfb.c b/drivers/video/fbdev/imsttfb.c index bea45647184e..fc046886599c 100644 --- a/drivers/video/fbdev/imsttfb.c +++ b/drivers/video/fbdev/imsttfb.c @@ -17,6 +17,7 @@ */ #include +#include #include #include #include @@ -1560,16 +1561,16 @@ static void imsttfb_remove(struct pci_dev *pdev) #ifndef MODULE static int __init -imsttfb_setup(char *options) +imsttfb_setup(const char *options) { - char *this_opt; + struct option_iter iter; + const char *this_opt; - if (!options || !*options) - return 0; + option_iter_init(&iter, options); - while ((this_opt = strsep(&options, ",")) != NULL) { + while (option_iter_next(&iter, this_opt)) { if (!strncmp(this_opt, "font:", 5)) { - char *p; + const char *p; int i; p = this_opt + 5; @@ -1608,6 +1609,9 @@ imsttfb_setup(char *options) } #endif } + + option_iter_release(&iter); + return 0; }