From patchwork Thu Mar 9 16:00:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 662248 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 0593FC77B60 for ; Thu, 9 Mar 2023 16:03:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231224AbjCIQDc (ORCPT ); Thu, 9 Mar 2023 11:03:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231610AbjCIQCU (ORCPT ); Thu, 9 Mar 2023 11:02:20 -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 DEABCF8A48; Thu, 9 Mar 2023 08:02:17 -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 91F6020187; Thu, 9 Mar 2023 16:02:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377736; 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=+Fvb4dPXHzZD/13C8edGQz9gQl5cXDYn4iOfZr+To1w=; b=pm629shnQGKiBBzrb5+svkmSoJF+pNnls41PQ/vMQxKfkhV3DvoddGC87F2oTKavt6j+zN 8cuw0qj8h167xmuDD1saIJ4SB+ScJxIpnBuFm+DdsWeh/UgpJ6Dlv6fg8kVtxNG4iEFTFv bncU6vSQJft37xWHdbIUKU9ZZIiqmTA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377736; 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=+Fvb4dPXHzZD/13C8edGQz9gQl5cXDYn4iOfZr+To1w=; b=9LVYwwmbreLK0qJ6oYY8OIE07dDgcNSwoV8BwX3bZbTbHofzMoswL4EnI2dsAQwqNFx6lH vAYXKckuD1SFU8Ag== 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 2E8B013A73; Thu, 9 Mar 2023 16:02:16 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id gL9qCggDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:16 +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 029/101] fbdev/grvga: Parse option string with struct option_iter Date: Thu, 9 Mar 2023 17:00:49 +0100 Message-Id: <20230309160201.5163-30-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/grvga.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/video/fbdev/grvga.c b/drivers/video/fbdev/grvga.c index 28c2e0e0763a..742331d0f08b 100644 --- a/drivers/video/fbdev/grvga.c +++ b/drivers/video/fbdev/grvga.c @@ -10,6 +10,7 @@ * Contributors: Kristoffer Glembo */ +#include #include #include #include @@ -334,6 +335,8 @@ static int grvga_probe(struct platform_device *dev) unsigned long grvga_mem_size = 0; struct grvga_par *par = NULL; char *options = NULL, *mode_opt = NULL; + struct option_iter iter; + char *this_opt; info = framebuffer_alloc(sizeof(struct grvga_par), &dev->dev); if (!info) @@ -353,15 +356,13 @@ static int grvga_probe(struct platform_device *dev) if (!options || !*options) options = "640x480-8@60"; - while (1) { - char *this_opt = strsep(&options, ","); - - if (!this_opt) - break; + option_iter_init(&iter, options); + while (option_iter_next(&iter, &this_opt)) { if (!strncmp(this_opt, "custom", 6)) { if (grvga_parse_custom(this_opt, &info->var) < 0) { dev_err(&dev->dev, "Failed to parse custom mode (%s).\n", this_opt); + option_iter_release(&iter); retval = -EINVAL; goto free_fb; } @@ -373,6 +374,8 @@ static int grvga_probe(struct platform_device *dev) mode_opt = devm_kstrdup(&dev->dev, opt, GFP_KERNEL); // ignore errors } + option_iter_release(&iter); + par = info->par; info->fbops = &grvga_ops; info->fix = grvga_fix;