From patchwork Thu Mar 9 16:01:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 662212 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 09481C77B60 for ; Thu, 9 Mar 2023 16:05:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232211AbjCIQFD (ORCPT ); Thu, 9 Mar 2023 11:05:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231769AbjCIQCq (ORCPT ); Thu, 9 Mar 2023 11:02:46 -0500 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37888F7EC9; Thu, 9 Mar 2023 08:02:45 -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 E51032019C; Thu, 9 Mar 2023 16:02:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377763; 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=Ewk1zW+eJTNjlZhtMIf7xoC1lhKXLT0JOMFhSzbnk2I=; b=W8t0NpW6nUBoUC6nOtj8OYG4dlb2Wir2e0S7qsu1tGBDg1OVfUMaZC9SfNnFPv83dlgal5 ATx9fPTNlMgxGGrnOxh+/3azWFejpIvlXRgDbHbDThikNI1gTLmbrcm7LNNu67rjERZrL1 mFqMzEQ7gpFZBZ8yZQupXA1CVuXDZHI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377763; 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=Ewk1zW+eJTNjlZhtMIf7xoC1lhKXLT0JOMFhSzbnk2I=; b=nmkM7AlEnDqTw3Pxe33LJ0VWVSWtjwybLvxhhm0zRm+ZLzRBaNwjKqWdKjJyqPghMVb4IO C/JmGbL+n0AJKrCA== 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 80F5813A73; Thu, 9 Mar 2023 16:02:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 6NCMHiMDCmQHbgAAMHmgww (envelope-from ); Thu, 09 Mar 2023 16:02:43 +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 097/101] fbdev/vt8623fb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:57 +0100 Message-Id: <20230309160201.5163-98-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 constifying the option string. v2: * replace static memory with kstrdup()/kfree() (Geert) Signed-off-by: Thomas Zimmermann --- drivers/video/fbdev/vt8623fb.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/vt8623fb.c b/drivers/video/fbdev/vt8623fb.c index 034333ee6e45..321b1813cf3c 100644 --- a/drivers/video/fbdev/vt8623fb.c +++ b/drivers/video/fbdev/vt8623fb.c @@ -95,6 +95,7 @@ static const struct svga_timing_regs vt8623_timing_regs = { /* Module parameters */ +static char *mode_option_buf; static char *mode_option = "640x480-8@60"; static int mtrr = 1; @@ -911,6 +912,7 @@ static void __exit vt8623fb_cleanup(void) { pr_debug("vt8623fb: cleaning up\n"); pci_unregister_driver(&vt8623fb_pci_driver); + kfree(mode_option_buf); } /* Driver Initialisation */ @@ -929,8 +931,10 @@ static int __init vt8623fb_init(void) if (fb_get_options("vt8623fb", &option)) return -ENODEV; - if (option && *option) - mode_option = option; + if (option && *option) { + mode_option_buf = kstrdup(option, GFP_KERNEL); // ignore errors + mode_option = mode_option_buf; + } #endif pr_debug("vt8623fb: initializing\n");