From patchwork Mon Mar 6 15:59:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 659549 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 D516AC77B70 for ; Mon, 6 Mar 2023 16:01:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231435AbjCFQA6 (ORCPT ); Mon, 6 Mar 2023 11:00:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41448 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230421AbjCFQAh (ORCPT ); Mon, 6 Mar 2023 11:00:37 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6ACCF26853; Mon, 6 Mar 2023 08:00:36 -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 29555223CC; Mon, 6 Mar 2023 16:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678118435; 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=slMylKd0o1pIzeZMW4EsaSmRliq1ZmGtsXfkeJQfBhI=; b=nWYRCxcpSw24XPnQhN6bsR7WDZgM5apHXp8qLJ8oOubE1YwShKqdO5TsIDKOMtJ3FPFb6N EZxbONNv0/77cheKLv9YZW6HrNa7N9p2dN+u8ZRCH6c/NY1jDBriNp7vIecSSHruZY/N9R zEcCu0I151s7ETsZ4rKWTZQfYb4sRPg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678118435; 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=slMylKd0o1pIzeZMW4EsaSmRliq1ZmGtsXfkeJQfBhI=; b=4kKE/MQinGXqJrRY+pyR3GyijdpoQkzvzi4uId+nsbVwA3X0bWWFnbwzB5QDn590hlGa6x yiJ+B/TIhTZCXFDA== 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 BDA8D13A6A; Mon, 6 Mar 2023 16:00:34 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id iONwLSIOBmQ/PwAAMHmgww (envelope-from ); Mon, 06 Mar 2023 16:00:34 +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 29/99] fbdev/grvga: Parse option string with struct option_iter Date: Mon, 6 Mar 2023 16:59:06 +0100 Message-Id: <20230306160016.4459-30-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/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 bb4baec2eccc..f803dc37c891 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; + const 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; } @@ -385,6 +386,8 @@ static int grvga_probe(struct platform_device *dev) } } + option_iter_release(&iter); + par = info->par; info->fbops = &grvga_ops; info->fix = grvga_fix;