From patchwork Thu Mar 9 16:01:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13167883 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 E99D2C7618D for ; Thu, 9 Mar 2023 16:04:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231191AbjCIQET (ORCPT ); Thu, 9 Mar 2023 11:04:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231733AbjCIQCe (ORCPT ); Thu, 9 Mar 2023 11:02:34 -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 12072F7EE2; Thu, 9 Mar 2023 08:02:34 -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 3049F20196; Thu, 9 Mar 2023 16:02:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377752; 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=C0mdrdYY6WhTpvHBsfeX6P5OoEx5EyTBYrjtJOl3HBs=; b=BkCig/A7RfJH2OsuwyUFdvUqV0LXetnqBM+gUG1ZY4qlCG0XCIWf/pA9pzTy5+6yhGL16O X7OT1Eqw/NXmFNkuYs0ILD3KUO++5/kR5Qi6qUAut0jxeJYothELdeIJS+HcvCN1Xh0NDj ht7LSpnNY4GFjSelHUuKwU9NxLwos8o= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377752; 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=C0mdrdYY6WhTpvHBsfeX6P5OoEx5EyTBYrjtJOl3HBs=; b=eFqUwD3scQ6k2cl+QjN0flfozu+J92KahG9F15ISWAypw0XFoq2VISamfFI5ilBXhH1zdg LPk+/2l9iJ+YQgCg== 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 CD7451391B; Thu, 9 Mar 2023 16:02:31 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id GPZRMRcDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:31 +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 069/101] fbdev/s3fb: Parse option string with struct option_iter Date: Thu, 9 Mar 2023 17:01:29 +0100 Message-Id: <20230309160201.5163-70-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/s3fb.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/video/fbdev/s3fb.c b/drivers/video/fbdev/s3fb.c index 6bcedcde8aad..37f5ea25efd6 100644 --- a/drivers/video/fbdev/s3fb.c +++ b/drivers/video/fbdev/s3fb.c @@ -12,6 +12,7 @@ */ #include +#include #include #include #include @@ -1521,18 +1522,15 @@ static struct pci_driver s3fb_pci_driver = { /* Parse user specified options */ #ifndef MODULE -static int __init s3fb_setup(char *options) +static int __init s3fb_setup(const char *options) { + struct option_iter iter; char *opt; - if (!options || !*options) - return 0; - - while ((opt = strsep(&options, ",")) != NULL) { + option_iter_init(&iter, options); - if (!*opt) - continue; - else if (!strncmp(opt, "mtrr:", 5)) + while (option_iter_next(&iter, &opt)) { + if (!strncmp(opt, "mtrr:", 5)) mtrr = simple_strtoul(opt + 5, NULL, 0); else if (!strncmp(opt, "fasttext:", 9)) fasttext = simple_strtoul(opt + 9, NULL, 0); @@ -1543,6 +1541,8 @@ static int __init s3fb_setup(char *options) } } + option_iter_release(&iter); + return 0; } #endif