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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BFB1DCCA462 for ; Fri, 16 Oct 2026 13:32:28 +0000 (UTC) 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=IUWZl8dnS8Xn1FGNiuTH0QLuoJJoqC4I64OqXnPNuc4=; b=WPT3V9qjrE+4+4V2pfx8wRVaAP 7Bq7UoKNxsM06BcWxohpA0zNE8aK5vOQynPLvau3yold8r2q14jgZMnkDyikcBJEVhCN7DBjfnTc0 xZuH+a7Z5ZY1FOj2XvIjouREk9VG/pBJxlAm5tOYAqMneU1h+ksElPp02ZJLWQ2/Smw1pTMNPX6Eq yEh7GAi0m/rR4RLPV9GyVvF3MNx/iZ5KFm/1/oSy/f7eDcaKf9N33tXy8x4AjAYdqsSxEpfNfgeHc 7xBgO7o6oY8LKo0fWRIyd2YRV9Zx762eYF7FPWUVyZKHaFaXNOF/OCJ9hBV0AmIx0WZsRqr+OmNN8 pvGQqz6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHi2o-000000033AM-1IQp; Fri, 16 Oct 2026 13:32:22 +0000 Received: from mgamail.intel.com ([192.198.163.12]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHi2l-0000000339c-2ePm for linux-arm-kernel@lists.infradead.org; Fri, 16 Oct 2026 13:32:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792157540; x=1823693540; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=4tww+20O5RpFk7JwnGATK7P/ns2O8SLs2ij/rA77nLQ=; b=ePV/MQTtWj3uKbJHuUcR6dY41nnf8qPuS10Q75/C0WRxyjnMgWM86nYl rkk47hwW5+IjFdPBKM7yAzZ8TCUlqiP3W7oN1WTU4tt8MZeqHimt+iifm Ajuz6SSdmx/8JvHF78oifGkH3EpmfRbrcCsdfbmFC1PiKwZXVVmv/IlRt tNobRs3N7p6DrD97flOUgkWSFLdOYMzeana2JZh4wt9sjISw6225ulEmj N9sAEemAp2I1tOdVJeTIEtAL6cXOVJ8YPbnkNa2cn6RC2AuNcwZXELZv1 HQ/r/jFK8iwFhT2d6ABErzUj8b9LepYYY3cQMNLJiTeWVKkdBTxVFtGEx A==; X-CSE-ConnectionGUID: jSovARBXR/Wa4YFGaROGrg== X-CSE-MsgGUID: HDxgykAkTHC2qnWjzMYPRg== X-IronPort-AV: E=McAfee;i="6800,10657,11936"; a="842675" X-IronPort-AV: E=Sophos;i="6.27,161,1787036400"; d="scan'208";a="842675" Received: from fmviesa012.fm.intel.com ([10.60.135.152]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2026 06:32:19 -0700 X-CSE-ConnectionGUID: NVBJKEN4SGaQqu0Yi8G49w== X-CSE-MsgGUID: F+NQ+lOaROKub8UktRSdOg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,161,1787036400"; d="scan'208";a="3695412" Received: from mkosciow-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.35]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2026 06:32:16 -0700 Date: Fri, 16 Oct 2026 16:32:13 +0300 From: Andy Shevchenko To: Arnd Bergmann Cc: Greg Kroah-Hartman , Jiri Slaby , Uwe =?iso-8859-1?Q?Kleine-K=F6nig_=28The_Capable_Hub=29?= , Hugo Villeneuve , Arnd Bergmann , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev Subject: Re: [PATCH 1/2] tty: serial: remove hub6 multiport support Message-ID: References: <20261016130328.1037616-1-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261016130328.1037616-1-arnd@kernel.org> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261016_063219_690155_DA54E879 X-CRM114-Status: GOOD ( 16.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Oct 16, 2026 at 02:59:47PM +0200, Arnd Bergmann wrote: > hub6 support was added in linux-0.99 and the hardware was already old at > the time, being discontinued in 1990. The code for it has always been a > mess since it adds another dimension to the I/O addressing in the driver > that has leaked into many individual files. > > Hugo and Uwe have attempted several times this year alone to isolate > the hub6 handling into the 8250_hub6.c file, but I feel that none of > this has been a real improvement over the original standalone loadable > module support. > > Any machine that would have used this ISA card in practice is likely > 30 to 40 years old, and with i486 support now removed, it is clearly > safe to just kill this all off. The only bit that has to remain > is the ioctl interface, to ensure the serial_struct field is always > zero. After reading patch 2/2 I noticed also a SERIAL_IO_HUB6 leftover. Most likely it should stay as is until the user space gets rid of the use. -- With Best Regards, Andy Shevchenko