From patchwork Thu Mar 9 16:01:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13167891 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 3053AC7618A for ; Thu, 9 Mar 2023 16:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231875AbjCIQEd (ORCPT ); Thu, 9 Mar 2023 11:04:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231742AbjCIQCh (ORCPT ); Thu, 9 Mar 2023 11:02:37 -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 5EFA4F5AAA; Thu, 9 Mar 2023 08:02:36 -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-out2.suse.de (Postfix) with ESMTPS id 14ED120188; Thu, 9 Mar 2023 16:02:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377755; 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=JVZXeFOij00kRcHliLoRJrMyHyqeyRSXeS/4JiKw1+4=; b=oycjPTqX0Nu9kVuARt5SyGrF4xBlSmhXVQTpgeM0jHtxkgEDQ9Sycw+FpNBC1aJYAc3B4g nTHE/VRCf+2lto6LOSXg9ylMDlKD1kB9rbdqJ6DxrJIRxd8RpHVyOGwx4s0N+U6c5vB4zs Q6g4PygtLOu6Ra/I7MEJPj/GMaGHm8Y= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377755; 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=JVZXeFOij00kRcHliLoRJrMyHyqeyRSXeS/4JiKw1+4=; b=iU9zauDRacbuOoy7KnMjtREgfUQLKh4m4lqK+t7ilZ2003HWOx3Zq+waNLG5fWMeFCu9kZ 9EWupGJkvHEIsmAQ== 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 A9F6613A73; Thu, 9 Mar 2023 16:02:34 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id cL2VKBoDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:34 +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 076/101] fbdev/sstfb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:36 +0100 Message-Id: <20230309160201.5163-77-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/sstfb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/sstfb.c b/drivers/video/fbdev/sstfb.c index da296b2ab54a..f422b1882950 100644 --- a/drivers/video/fbdev/sstfb.c +++ b/drivers/video/fbdev/sstfb.c @@ -106,6 +106,7 @@ static bool slowpci; /* slow PCI settings */ */ #define DEFAULT_VIDEO_MODE "640x480@60" +static char *mode_option_buf; static char *mode_option = DEFAULT_VIDEO_MODE; enum { @@ -1301,8 +1302,11 @@ static int sstfb_setup(char *options) mem = simple_strtoul (this_opt+4, NULL, 0); else if (!strncmp(this_opt, "gfxclk:",7)) gfxclk = simple_strtoul (this_opt+7, NULL, 0); - 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; } @@ -1516,6 +1520,7 @@ static int sstfb_init(void) static void sstfb_exit(void) { pci_unregister_driver(&sstfb_driver); + kfree(mode_option_buf); }