From patchwork Fri Apr 28 12:24:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13226365 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 E1E85C77B61 for ; Fri, 28 Apr 2023 12:25:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230207AbjD1MZO (ORCPT ); Fri, 28 Apr 2023 08:25:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230365AbjD1MZD (ORCPT ); Fri, 28 Apr 2023 08:25:03 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C4FE46B8 for ; Fri, 28 Apr 2023 05:25:01 -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-out2.suse.de (Postfix) with ESMTPS id 3161F2008F; Fri, 28 Apr 2023 12:25:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1682684700; 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=jZcBrX85X9D4JYEqK4P+onn+XI0Hc3Cl8Gd19NFQU5o=; b=CrEA+kxiVCmmkPWYWXwsnqzBiITp4bZos97PqEEUj2kKuyfHZquvsC/26qMbHy2QMzjJPa p2ONuyzpuETvL13NaunetRnRcGLyo4TQ3lbYKecV8nMZQ27lbr2Xpp3oqzIcUkPZW7uQ3f /gRqkJABwJ/9GHdzwml+P2Al9MYzRwc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1682684700; 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=jZcBrX85X9D4JYEqK4P+onn+XI0Hc3Cl8Gd19NFQU5o=; b=IHlfY4+MoF5u5stpi88bjDgt+BQRrimWnnUbCL63Lt/jM56R4cpXA0tAjR4KSpY4orlaGt BtJfZ/scnHmUi1Dg== 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 E576D139C3; Fri, 28 Apr 2023 12:24:59 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 2L4xNxu7S2RgeAAAMHmgww (envelope-from ); Fri, 28 Apr 2023 12:24:59 +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 , Sui Jingfeng , Geert Uytterhoeven Subject: [PATCH v2 16/19] fbdev: Don't re-validate info->state in fb_ops implementations Date: Fri, 28 Apr 2023 14:24:49 +0200 Message-Id: <20230428122452.4856-17-tzimmermann@suse.de> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230428122452.4856-1-tzimmermann@suse.de> References: <20230428122452.4856-1-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}. v2: * also remove test from ivtvfb, braodsheetfb, hecubafb and metronomefb (Geert) Signed-off-by: Thomas Zimmermann Tested-by: Sui Jingfeng Reviewed-by: Javier Martinez Canillas Reviewed-by: Geert Uytterhoeven Acked-by: Helge Deller --- drivers/media/pci/ivtv/ivtvfb.c | 3 --- drivers/video/fbdev/broadsheetfb.c | 3 --- drivers/video/fbdev/core/fb_sys_fops.c | 6 ------ drivers/video/fbdev/hecubafb.c | 3 --- drivers/video/fbdev/metronomefb.c | 3 --- drivers/video/fbdev/sm712fb.c | 6 ------ 6 files changed, 24 deletions(-) diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c index 00ac94d4ab19..22123a25daea 100644 --- a/drivers/media/pci/ivtv/ivtvfb.c +++ b/drivers/media/pci/ivtv/ivtvfb.c @@ -378,9 +378,6 @@ static ssize_t ivtvfb_write(struct fb_info *info, const char __user *buf, unsigned long dma_size; u16 lead = 0, tail = 0; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->screen_size; if (total_size == 0) diff --git a/drivers/video/fbdev/broadsheetfb.c b/drivers/video/fbdev/broadsheetfb.c index 65dc86b7081e..691de5df581b 100644 --- a/drivers/video/fbdev/broadsheetfb.c +++ b/drivers/video/fbdev/broadsheetfb.c @@ -1013,9 +1013,6 @@ static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, int err = 0; unsigned long total_size; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->fix.smem_len; if (p > total_size) 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/hecubafb.c b/drivers/video/fbdev/hecubafb.c index ddfa2853cc41..a2996d39f918 100644 --- a/drivers/video/fbdev/hecubafb.c +++ b/drivers/video/fbdev/hecubafb.c @@ -163,9 +163,6 @@ static ssize_t hecubafb_write(struct fb_info *info, const char __user *buf, int err = 0; unsigned long total_size; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->fix.smem_len; if (p > total_size) diff --git a/drivers/video/fbdev/metronomefb.c b/drivers/video/fbdev/metronomefb.c index afa9b41f5a87..2bb068cadac6 100644 --- a/drivers/video/fbdev/metronomefb.c +++ b/drivers/video/fbdev/metronomefb.c @@ -523,9 +523,6 @@ static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf, int err = 0; unsigned long total_size; - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - total_size = info->fix.smem_len; if (p > total_size) 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)