From patchwork Thu Mar 9 16:01:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13167904 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 A4AE5C76188 for ; Thu, 9 Mar 2023 16:05:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232136AbjCIQEu (ORCPT ); Thu, 9 Mar 2023 11:04:50 -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 S229827AbjCIQCl (ORCPT ); Thu, 9 Mar 2023 11:02:41 -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 25685F7EEF; Thu, 9 Mar 2023 08:02:41 -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 B1E1A2216B; Thu, 9 Mar 2023 16:02:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377759; 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=MbkEoqNuabDKTrYaFVmNx0VjwVOlQDJULtP3vwgd1E0=; b=Cn8uGqp5M5smyRMMNCsXWHxfc/s4Z5peRZTRDoPdA2g9IOYOgWr2rzh3xx+V4sdGFgxvdv 8yI6Zuhl8I6oaIKM4fKLNPc94cWJ7xQDOixwbE0TlrIk0VRuDROcy0xPywTsRaGcmshX9+ jk/i3u0/vsw2BUXA8EkQ3hGIdJRIWKg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377759; 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=MbkEoqNuabDKTrYaFVmNx0VjwVOlQDJULtP3vwgd1E0=; b=uRdHWmq96txYBHIvZDC762EjfU5koNZU/tZip6TPvrOcv/cYJbOwK+/p+a1gCcTNlvDQXG PBZUyIYWK8ZAhVBw== 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 4EADE13A73; Thu, 9 Mar 2023 16:02:39 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id CJ1DEh8DCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:39 +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 087/101] fbdev/uvesafb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:47 +0100 Message-Id: <20230309160201.5163-88-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/uvesafb.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c index f09f483c219b..ff8f511a00c2 100644 --- a/drivers/video/fbdev/uvesafb.c +++ b/drivers/video/fbdev/uvesafb.c @@ -56,6 +56,7 @@ static u16 maxclk; /* maximum pixel clock */ static u16 maxvf; /* maximum vertical frequency */ static u16 maxhf; /* maximum horizontal frequency */ static u16 vbemode; /* force use of a specific VBE mode */ +static char *mode_option_buf; static char *mode_option; static u8 dac_width = 6; @@ -1851,7 +1852,9 @@ static int uvesafb_setup(char *options) else if (!strncmp(this_opt, "vbemode:", 8)) vbemode = simple_strtoul(this_opt + 8, NULL, 0); else if (this_opt[0] >= '0' && this_opt[0] <= '9') { - mode_option = this_opt; + kfree(mode_option_buf); + mode_option_buf = kstrdup(this_opt, GFP_KERNEL); // ignore errors + mode_option = mode_option_buf; } else { pr_warn("unrecognized option %s\n", this_opt); } @@ -1937,6 +1940,7 @@ static void uvesafb_exit(void) driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); platform_device_unregister(uvesafb_device); platform_driver_unregister(&uvesafb_driver); + kfree(mode_option_buf); } module_exit(uvesafb_exit);