From patchwork Thu Mar 9 16:01:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13167880 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 B4F0AC61DA4 for ; Thu, 9 Mar 2023 16:04:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232062AbjCIQEP (ORCPT ); Thu, 9 Mar 2023 11:04:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231708AbjCIQCb (ORCPT ); Thu, 9 Mar 2023 11:02:31 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 626B5F7EC6; Thu, 9 Mar 2023 08:02:30 -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 2389322160; Thu, 9 Mar 2023 16:02:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377749; 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=0OUYBLEIZcEGaUUIng7YnnYmnpc0Gk2LmDknjSg1lT8=; b=HHyh9U+3DSvAJPIq2fS/7MfoeTzd9ObdeJFQMqxok1yiU1rJWTiLvkXevHpyQbRRwFO96x 0NkhHnyZ+E5GlKDN6rl9vjIMXHGaW6suVHsS2OlvEnSS+b9KEh40L1smvlgHvzhYSQ/yD1 aOebOveTWnG6osC9mFLo5t2nNZ0/GFA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377749; 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=0OUYBLEIZcEGaUUIng7YnnYmnpc0Gk2LmDknjSg1lT8=; b=R8KA2keggD95kmGethWRsJYpX9jmMj2Y1uKN3FdxDP9nIhNjdO2/O4nVZhvn1pRybcyAJj 3IHbjBH38DmiLYAA== 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 C14891391B; 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 6PhPLhQDCmQHbgAAMHmgww (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 061/101] fbdev/ps3fb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:21 +0100 Message-Id: <20230309160201.5163-62-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/ps3fb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/ps3fb.c b/drivers/video/fbdev/ps3fb.c index 2fe08b67eda7..d67ef2701b18 100644 --- a/drivers/video/fbdev/ps3fb.c +++ b/drivers/video/fbdev/ps3fb.c @@ -260,6 +260,7 @@ static const struct fb_videomode ps3fb_modedb[] = { static int ps3fb_mode; module_param(ps3fb_mode, int, 0); +static char *mode_option_buf; static char *mode_option; static int ps3fb_cmp_mode(const struct fb_videomode *vmode, @@ -1276,8 +1277,11 @@ static int __init ps3fb_setup(void) continue; if (!strncmp(this_opt, "mode:", 5)) ps3fb_mode = simple_strtoul(this_opt + 5, 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; } @@ -1294,6 +1298,7 @@ static void __exit ps3fb_exit(void) { pr_debug(" -> %s:%d\n", __func__, __LINE__); ps3_system_bus_driver_unregister(&ps3fb_driver); + kfree(mode_option_buf); pr_debug(" <- %s:%d\n", __func__, __LINE__); }