From patchwork Thu Mar 9 16:01:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13167870 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 E4534C77B6C for ; Thu, 9 Mar 2023 16:04:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232016AbjCIQEE (ORCPT ); Thu, 9 Mar 2023 11:04:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231670AbjCIQC1 (ORCPT ); Thu, 9 Mar 2023 11:02:27 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0533F7EF5; Thu, 9 Mar 2023 08:02:25 -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 25DDE2214C; Thu, 9 Mar 2023 16:02:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377744; 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=oiht1Q677qYpu9/3uJW+gjpB4dNDmWpMrYhgfn9g2bY=; b=DxMk3p9pHKgXUCXSS9Kql+DZLobewJ5VeFW2S3TV7oTkGJbY95wtdOCPVMj7KBU8TDSSn0 jj913Ar5Psna5Ck6IhBstQTcKktCdX0kTxmq6ssOSjp0sE+kln31aSLeafAQHhlJy7IASM oOqfk0BYxACG9UVMKmcJElhzndt2XEM= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377744; 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=oiht1Q677qYpu9/3uJW+gjpB4dNDmWpMrYhgfn9g2bY=; b=4BMvzee+Y7GQI119psWkGbS3oWLO9HQ6S8ktySDte0nmC3x32D4oZtQHAaJB00NzzF6pDi EZG1tCBuTByvxaCg== 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 B82951391B; Thu, 9 Mar 2023 16:02:23 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id uJIaLA8DCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:23 +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 048/101] fbdev/neofb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:08 +0100 Message-Id: <20230309160201.5163-49-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/neofb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/neofb.c b/drivers/video/fbdev/neofb.c index 39d8cdef5c97..98edb6822832 100644 --- a/drivers/video/fbdev/neofb.c +++ b/drivers/video/fbdev/neofb.c @@ -83,6 +83,7 @@ static bool external; static bool libretto; static bool nostretch; static bool nopciburst; +static char *mode_option_buf; static char *mode_option = NULL; #ifdef MODULE @@ -2198,8 +2199,11 @@ static int __init neofb_setup(char *options) nopciburst = 1; else if (!strncmp(this_opt, "libretto", 8)) libretto = 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; } @@ -2228,6 +2232,7 @@ module_init(neofb_init); static void __exit neofb_exit(void) { pci_unregister_driver(&neofb_driver); + kfree(mode_option_buf); } module_exit(neofb_exit);