From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D70CC607041D for ; Wed, 4 Nov 2026 19:42:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=23r/QurR; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=L+v8MGUB DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=rahx1hspTnUUAQKpjFRic8Zz7t4Brzv8z/TuH1t1gO8=; b=23r/QurRuCs/Ev nzri+Ij/p3zHOekD27huGGqTCQ5iDXyj5qkVX+TfjFXi/i88hXWGjAU996UEHekX2n+gRTKYCqXkz z/e11zF4wihoKJT30711rDdGv0qTHZ5CAO1olsiJLtMWBIacxnnZGBNmU/Efwx8RqB7Ylgl9qxhmS /PRi+K8zRkkL/fTGuFhnGi6sUBBx/YQ9S6/ByGroPRn137ZM4Npgw+GxsEjkGJxv4gS2GAneUuQM0 mdds/JqVLnXrUczp+rNssSkDhnVku8ovsYW+JcDRCncabag0VfpmAB8cqPOl5JI2ZQKeQH8a+Ge6a tJWIl8/V+49sQGXXUU0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOgst-00000006itM-1wKm; Wed, 04 Nov 2026 19:42:59 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOgsq-00000006isX-47vZ; Wed, 04 Nov 2026 19:42:57 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 686CC60F07; Wed, 4 Nov 2026 19:42:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDECB1F00A1C; Wed, 4 Nov 2026 19:42:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793821376; bh=rahx1hspTnUUAQKpjFRic8Zz7t4Brzv8z/TuH1t1gO8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=L+v8MGUBoH1X/DvXSD0FceOQi/7/9SNVN/Ty1A0Db3pP2tRHNvduiU+oluwXEpYIv vBloEcY3uuuLcYM/xkh9Q3Ii2iBnjyZbDio64xuo+SFrAPccC7M1STU5AfhNZaWOa5 +nP2mu+sMxiVgQETEU4GnEEdQBOVRnqy1LIn5OIvtUx8y3NHNRNYHmSudIvZhlAsk3 OeFfLyoqwVLhzDi55Du9gghVSwsVXKB+q9IGj4gdTIup4tw4O6Yjot81gM8SBfXGlP DerjiZ0JrNRX2zN8YxL3cqjnpijuu2TiisPtmqNQmMQzMS3akxk6dzKVcJZYEqbHRC UCnxPV/KjlSKw== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever Subject: [PATCH RESEND v2 02/26] zorro: let procfs copy out reads Date: Wed, 4 Nov 2026 20:42:41 +0100 Message-ID: <20261104-work-procfs-drivers-v2-2-245e54e87116@kernel.org> In-Reply-To: <20261104-work-procfs-drivers-v2-0-245e54e87116@kernel.org> References: <20261104-work-procfs-drivers-v2-0-245e54e87116@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1540; i=brauner@kernel.org; h=from:subject:message-id; bh=dTcni+P8tIxBcivisIxgfSpNG7N2UBKEyjWqJewPrL0=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97iqNXrF3deYLX61HjldsFnR/fLzW4ucS7htqmRfnb lp9iV3QsKOUhUGMi0FWTJHFod0kXG45T8Vmo0wNmDmsTCBDGLg4BWAiHkkMfziO9O96MiXH7oKe 3ttd/GcsTDguvkv8x6Mk19PlFNXPtoiRYf6v1T5HznUdqLi4/U2FCv/VOxZvpb9rrKvZvX3xnf1 XX/ICAA== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Implement ->proc_read_buf() so procfs copies what is read from /proc/bus/zorro/ to userspace after it unpinned the entry. Signed-off-by: Christian Brauner (Amutable) --- drivers/zorro/proc.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/zorro/proc.c b/drivers/zorro/proc.c index 4c6f8f1c4d71..99a8b478192d 100644 --- a/drivers/zorro/proc.c +++ b/drivers/zorro/proc.c @@ -28,7 +28,7 @@ proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) } static ssize_t -proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) +proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos) { struct zorro_dev *z = pde_data(file_inode(file)); struct ConfigDev cd; @@ -49,8 +49,7 @@ proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t * cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z)); cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z)); - if (copy_to_user(buf, (void *)&cd + pos, nbytes)) - return -EFAULT; + memcpy(buf, (void *)&cd + pos, nbytes); *ppos += nbytes; return nbytes; @@ -58,7 +57,7 @@ proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t * static const struct proc_ops bus_zorro_proc_ops = { .proc_lseek = proc_bus_zorro_lseek, - .proc_read = proc_bus_zorro_read, + .proc_read_buf = proc_bus_zorro_read, }; static void * zorro_seq_start(struct seq_file *m, loff_t *pos) -- 2.53.0