From patchwork Mon Mar 6 15:58:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 660181 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 34BECC6FD1C for ; Mon, 6 Mar 2023 16:01:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231388AbjCFQAz (ORCPT ); Mon, 6 Mar 2023 11:00:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230269AbjCFQAb (ORCPT ); Mon, 6 Mar 2023 11:00:31 -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 378492ED70; Mon, 6 Mar 2023 08:00:28 -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 423AB1FDEE; Mon, 6 Mar 2023 16:00:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678118426; 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=gKnsmkdajV5dwt0y63rKnWXciLaSNmTMATxql+kzlXQ=; b=m/l2WRz8+uGG7iRStMefAjKhRxVuhaUygsjz3Yr8sqUk+llkmsgNcoUOr66mqRK+5Ffkrt X0yxS7twf85QTr3a/ZmX8cKQ+6QS1/xdTM3DNOtaXz8u16xa4X1ssc5vx8I9QlzPbsMHfY OsnBJJWZsL+XR+YFy85KHEXB5nOE5uI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678118426; 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=gKnsmkdajV5dwt0y63rKnWXciLaSNmTMATxql+kzlXQ=; b=RofdsvmIu4jmtpHMXRhMHrAiFIEazlA7oJ28EW/eNK35pX+FTLAl33+toZbUJ1oprN/cFn LaxWe+nxW4VMXOAg== 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 E7E0313A6A; Mon, 6 Mar 2023 16:00:25 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id EAHaNxkOBmQ/PwAAMHmgww (envelope-from ); Mon, 06 Mar 2023 16:00:25 +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 05/99] fbdev/acornfb: Parse option string with struct option_iter Date: Mon, 6 Mar 2023 16:58:42 +0100 Message-Id: <20230306160016.4459-6-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/acornfb.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/video/fbdev/acornfb.c b/drivers/video/fbdev/acornfb.c index 8642136a6bdc..1d6dec45615c 100644 --- a/drivers/video/fbdev/acornfb.c +++ b/drivers/video/fbdev/acornfb.c @@ -14,6 +14,7 @@ * - Blanking 8bpp displays with VIDC */ +#include #include #include #include @@ -879,17 +880,15 @@ static struct options { { NULL, NULL } }; -static int acornfb_setup(char *options) +static int acornfb_setup(const char *options) { - struct options *optp; - char *opt; + struct option_iter iter; + const char *opt; - if (!options || !*options) - return 0; + option_iter_init(&iter, options); - while ((opt = strsep(&options, ",")) != NULL) { - if (!*opt) - continue; + while (option_iter_next(&iter, opt)) { + struct options *optp; for (optp = opt_table; optp->name; optp++) { int optlen; @@ -907,6 +906,9 @@ static int acornfb_setup(char *options) printk(KERN_ERR "acornfb: unknown parameter: %s\n", opt); } + + option_iter_release(&iter); + return 0; }