From patchwork Thu Mar 9 16:01:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 662225 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 D0130C61DA4 for ; Thu, 9 Mar 2023 16:04:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232081AbjCIQEe (ORCPT ); Thu, 9 Mar 2023 11:04:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231741AbjCIQCg (ORCPT ); Thu, 9 Mar 2023 11:02:36 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EB30DF4B43; Thu, 9 Mar 2023 08:02:35 -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 A52DF22166; Thu, 9 Mar 2023 16:02:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1678377754; 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=0gZ1Tmm3JEgeMqN/NPKY8oH5C/7S9gy9JQ3mKL7gtCM=; b=aClCiEjhtEvWWtKnoezDVvFJ/0p8+II1/ANYf4pu5EiDL7XF2rdltVl0y85P+Ha4Dn4ZNH zwMyiHi4MWV1eiin5k+j/f+5rLop399Dwzr+Ch3RBWzELK6MsXeMNTcWo3Tk5STdrD/tFI 04JdiAGAHPMFYJ40iwVJCCMsxvqG+Eg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1678377754; 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=0gZ1Tmm3JEgeMqN/NPKY8oH5C/7S9gy9JQ3mKL7gtCM=; b=u2IBZGAN1hguKZ934fTSEqBEE8/y5bWBVazblvDiXW5m5qNf9v2Uth46VrOGnZkWdgS5qR m/u8q/ceCBwgOIBQ== 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 496031391B; 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 OJ4JERoDCmQHbgAAMHmgww (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 075/101] fbdev/sm712fb: Duplicate video-mode option string Date: Thu, 9 Mar 2023 17:01:35 +0100 Message-Id: <20230309160201.5163-76-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/sm712fb.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/sm712fb.c b/drivers/video/fbdev/sm712fb.c index b528776c7612..a83f48fce5b1 100644 --- a/drivers/video/fbdev/sm712fb.c +++ b/drivers/video/fbdev/sm712fb.c @@ -831,6 +831,7 @@ static const struct modeinit vgamode[] = { static struct screen_info smtc_scr_info; +static char *mode_option_buf; static char *mode_option; /* process command line options, get vga parameter */ @@ -1761,8 +1762,12 @@ static int __init sm712fb_init(void) if (fb_get_options("sm712fb", &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; + } + sm7xx_vga_setup(mode_option); return pci_register_driver(&smtcfb_driver); @@ -1773,6 +1778,7 @@ module_init(sm712fb_init); static void __exit sm712fb_exit(void) { pci_unregister_driver(&smtcfb_driver); + kfree(mode_option_buf); } module_exit(sm712fb_exit);