From patchwork Tue Apr 25 14:28:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13223401 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 9CB12C77B7C for ; Tue, 25 Apr 2023 14:28:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233838AbjDYO2y (ORCPT ); Tue, 25 Apr 2023 10:28:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233991AbjDYO2w (ORCPT ); Tue, 25 Apr 2023 10:28:52 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47846D314 for ; Tue, 25 Apr 2023 07:28:51 -0700 (PDT) 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 E31A9219C0; Tue, 25 Apr 2023 14:28:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1682432929; 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=pEl4quZln5av8T3BtD9s4WiR9E5Q2FduIfE+05guzso=; b=t178I0XJ5CxTsI+8nzAFlB8ucfNb1PPB3QzyFMUjL9S+/HPgEnE6WAwEg14u/+lrYkoPZL KshC/S2/SspHOBYHXezu6Z43boBUJgAHdACX722PsnxOArRxKIuzXjqrk4fNq4yJ/8O21K t5bpjatAoZNRLvDT6siCLNbjelFTHJE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1682432929; 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=pEl4quZln5av8T3BtD9s4WiR9E5Q2FduIfE+05guzso=; b=Z6qbksarB0GU9Iarrc82/oIr5YyopNUmeksuQvw3niiSWFcgF78dLAEvTibn8MdWH//ezJ VWoucAn//v+b25AA== 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 A858B13920; Tue, 25 Apr 2023 14:28:49 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id kPgwKKHjR2ReOgAAMHmgww (envelope-from ); Tue, 25 Apr 2023 14:28:49 +0000 From: Thomas Zimmermann To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, daniel@ffwll.ch, javierm@redhat.com, deller@gmx.de, geert@linux-m68k.org, sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann Subject: [PATCH 3/6] fbdev: Don't re-validate info->state in fb_ops implementations Date: Tue, 25 Apr 2023 16:28:43 +0200 Message-Id: <20230425142846.730-4-tzimmermann@suse.de> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230425142846.730-1-tzimmermann@suse.de> References: <20230425142846.730-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org The file-op entry points fb_read() and fb_write() verify that info->state has been set to FBINFO_STATE_RUNNING. Remove the same test from the implementations of struct fb_ops.{fb_read,fb_write}. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Tested-by: Sui Jingfeng Reviewed-by: Geert Uytterhoeven --- drivers/video/fbdev/core/fb_sys_fops.c | 6 ------ drivers/video/fbdev/sm712fb.c | 6 ------ 2 files changed, 12 deletions(-) diff --git a/drivers/video/fbdev/core/fb_sys_fops.c b/drivers/video/fbdev/core/fb_sys_fops.c index 6589123f4127..7dee5d3c7fb1 100644 --- a/drivers/video/fbdev/core/fb_sys_fops.c +++ b/drivers/video/fbdev/core/fb_sys_fops.c @@ -22,9 +22,6 @@ ssize_t fb_sys_read(struct fb_info *info, char __user *buf, size_t count, unsigned long total_size, c; ssize_t ret; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->screen_size; if (total_size == 0) @@ -64,9 +61,6 @@ ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, unsigned long total_size, c; size_t ret; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->screen_size; if (total_size == 0) diff --git a/drivers/video/fbdev/sm712fb.c b/drivers/video/fbdev/sm712fb.c index b528776c7612..6f852cd756c5 100644 --- a/drivers/video/fbdev/sm712fb.c +++ b/drivers/video/fbdev/sm712fb.c @@ -1031,9 +1031,6 @@ static ssize_t smtcfb_read(struct fb_info *info, char __user *buf, if (!info || !info->screen_base) return -ENODEV; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->screen_size; if (total_size == 0) @@ -1097,9 +1094,6 @@ static ssize_t smtcfb_write(struct fb_info *info, const char __user *buf, if (!info || !info->screen_base) return -ENODEV; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->screen_size; if (total_size == 0)