From patchwork Thu Mar 9 16:01:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 661250 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 7B1CDC77B70 for ; Thu, 9 Mar 2023 16:04:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232032AbjCIQEI (ORCPT ); Thu, 9 Mar 2023 11:04:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231702AbjCIQCa (ORCPT ); Thu, 9 Mar 2023 11:02:30 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3593F7EC5; Thu, 9 Mar 2023 08:02:29 -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 628AD2215A; Thu, 9 Mar 2023 16:02:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377748; 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=U+Wv5+2Mg/OOpac2b+Kt6VAraiPSH3rcxItITwlujo0=; b=2MNMPBZYCIIHTJ2a9JkvDWsYV8evjucSV74au32ruPU/hzE/mOYrSxmf61i7KgGaAYkliZ DWu+fI20MDJORKJm3G1h6mvegZdTJ5/Fl91EZGDPqh1Goif9fF/ROHx893iPmOCjMZAniT IRpWPGDs9DVrRLU/zkJD4qSX+cGhguI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377748; 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=U+Wv5+2Mg/OOpac2b+Kt6VAraiPSH3rcxItITwlujo0=; b=IYkv7jGmizkWRSS1WbdG2KFhNI5g5MrC25KLR887jQRD8KgRS6cMUcN2U/skNhJzjD0g2k SMKmJL+ohR28VlCg== 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 09A8C1391B; Thu, 9 Mar 2023 16:02:28 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 0CqGARQDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:28 +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 059/101] fbdev/pm3fb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:19 +0100 Message-Id: <20230309160201.5163-60-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 Assume that the driver does not own the option string or its substrings and hence duplicate the option string for the video mode. Allocate the copy's memory with kstrdup() and free it in the module's exit function. Done in preparation of switching the driver to struct option_iter and constifying the option string. v2: * replace static memory with kstrdup()/kfree() (Geert) Signed-off-by: Thomas Zimmermann --- drivers/video/fbdev/pm3fb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/pm3fb.c b/drivers/video/fbdev/pm3fb.c index b46a471df9ae..b6b378e7554d 100644 --- a/drivers/video/fbdev/pm3fb.c +++ b/drivers/video/fbdev/pm3fb.c @@ -54,6 +54,7 @@ * Driver data */ static int hwcursor = 1; +static char *mode_option_buf; static char *mode_option; static bool noaccel; static bool nomtrr; @@ -1526,8 +1527,11 @@ static int __init pm3fb_setup(char *options) hwcursor = simple_strtoul(this_opt + 9, NULL, 0); else if (!strncmp(this_opt, "nomtrr", 6)) nomtrr = 1; - else - mode_option = this_opt; + else { + kfree(mode_option_buf); + mode_option_buf = kstrdup(this_opt, GFP_KERNEL); // ignore errors + mode_option = mode_option_buf; + } } return 0; } @@ -1558,6 +1562,7 @@ static int __init pm3fb_init(void) static void __exit pm3fb_exit(void) { pci_unregister_driver(&pm3fb_driver); + kfree(mode_option_buf); } module_exit(pm3fb_exit);