From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CCCFC4320A for ; Mon, 26 Jul 2021 07:57:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E84860F4E for ; Mon, 26 Jul 2021 07:57:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232700AbhGZHRX (ORCPT ); Mon, 26 Jul 2021 03:17:23 -0400 Received: from mail-lf1-f43.google.com ([209.85.167.43]:42509 "EHLO mail-lf1-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232120AbhGZHRU (ORCPT ); Mon, 26 Jul 2021 03:17:20 -0400 Received: by mail-lf1-f43.google.com with SMTP id u3so13860469lff.9; Mon, 26 Jul 2021 00:57:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Bgh7g2bRbIRcIJQ3wHLFOCKDp96I67ZCmk6/nj8zq70=; b=j3Uey8OhHJEZw8FyJnXZcIOxjlAzEzsRxiGyGtku2UaBccfE7AApeR8GdQSlZT7v7A zTOKuLUdezicdHsnj8Xw37JLESn2yQL1hdTzO+/qnmorKaHLx5GL8VjW8olbGV1daJz+ gjHn37PdTukwpyo8ByDQsFjEKsM/tsBJyzbbTPhhmD6dynhV6RYHzr29oYxwtBrPSolx Eq4UU7D2Txp4wkvtY7OnfXF8aVeoDgd1fJsdJALTDKV7SbbamwMnDUpG1wJPgJIk0R9z iYgFf3JJeyf93ofOvQSPkCWrgF8NdUhknXuLsUOmgjyWKGS8YzwBlDkz0sNI6m6MJUR2 WOUg== X-Gm-Message-State: AOAM5300ouw1EvyPUL6LINxMsaT1KW7i2Cs81sgbyZzOS3D+fUs8JQfI Akn3uzaNS74C4Bu00bhKY4Q= X-Google-Smtp-Source: ABdhPJySagHfPM/5iL3RlRVr7JOA22yR5kRHYLUMZ9YRInyhzVj+2kCb4deMAFuGQI8/dkFC8M0PIw== X-Received: by 2002:ac2:44c2:: with SMTP id d2mr12763402lfm.50.1627286267195; Mon, 26 Jul 2021 00:57:47 -0700 (PDT) Received: from [192.168.140.89] ([46.175.31.194]) by smtp.gmail.com with ESMTPSA id y7sm2968725lfg.256.2021.07.26.00.57.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Jul 2021 00:57:46 -0700 (PDT) Subject: Re: [BUG] FLOPPY DRIVER since 5.10.20 To: markh@compro.net, linux-block@vger.kernel.org, Linux-kernel Cc: Jiri Kosina , Mark Hounschell , Greg Kroah-Hartman References: From: Denis Efremov Message-ID: Date: Mon, 26 Jul 2021 10:57:45 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 7/23/21 9:47 PM, Mark Hounschell wrote: > > These 2 incremental patches, patch-5.10.19-20 and patch-5.11.2-3 have broken the user land fd = open("/dev/fd0", (O_RDWR | O_NDELAY)); functionality. Thank you for the report, I'm looking into this. > Since FOREVER before the patch, when using O_NDELAY, one could open the floppy device with no media inserted or even with write protected media without error. "Read-only file system" status is returned only when we actually tried to write to it. We have software still in use today that relies on this functionality. If it's a project with open sources could you please give a link? Regards, Denis