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=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 2071FC5DF64 for ; Wed, 6 Nov 2019 11:17:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D96E92077C for ; Wed, 6 Nov 2019 11:17:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573039031; bh=MofkAeh32ygz8kQiJ/NW8nxCM7dhfQeKB7/bbaa70aU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=Wv9ONMBn9a/fAo3k81NslWcor2NpGXxmiUaiPWm+cgtGs2BOJWrIwgVnOKsv9TxOB vNHkDmXmgZYtXNjbVvw7VraFS5fqPAYejzCZR1u1TWW2fhkGgUOBs33VnBdzwtiOk1 Xeek3DUHKb3Lg2yWDsNMq+COzjc+Y2hIoQfXvaEQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730322AbfKFLRJ (ORCPT ); Wed, 6 Nov 2019 06:17:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:52106 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725890AbfKFLRJ (ORCPT ); Wed, 6 Nov 2019 06:17:09 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 12B192067B; Wed, 6 Nov 2019 11:17:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573039028; bh=MofkAeh32ygz8kQiJ/NW8nxCM7dhfQeKB7/bbaa70aU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ns9bAC0NqPB9Y8HYDug8Evp+nR+wHYk3/sqAjAcgF9twD05PXqHjgA7LBc6r7yiEa SFCzyhXELwHDKfwXqsCuv4Pr8PdDIWLg23rSncp1FMWKdvzJLkrYtnJbD54ae9/woL D4AinOxxBdoy3rg7i7xRze7VjeSoujc7MhNEd64U= Date: Wed, 6 Nov 2019 12:17:06 +0100 From: Greg Kroah-Hartman To: Oliver Neukum Cc: Sasha Levin , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Alan Stern , Christoph Hellwig Subject: Re: [PATCH 4.9 37/62] UAS: Revert commit 3ae62a42090f ("UAS: fix alignment of scatter/gather segments") Message-ID: <20191106111706.GA3033188@kroah.com> References: <20191104211901.387893698@linuxfoundation.org> <20191104211940.713506931@linuxfoundation.org> <1572964268.2921.19.camel@suse.com> <20191106001102.GI4787@sasha-vm> <1573026302.3090.2.camel@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1573026302.3090.2.camel@suse.com> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 06, 2019 at 08:45:02AM +0100, Oliver Neukum wrote: > Am Dienstag, den 05.11.2019, 19:11 -0500 schrieb Sasha Levin: > > On Tue, Nov 05, 2019 at 03:31:08PM +0100, Oliver Neukum wrote: > > > Am Montag, den 04.11.2019, 22:44 +0100 schrieb Greg Kroah-Hartman: > > > > All the host controllers capable of SuperSpeed operation can > > > > handle fully general SG; > > > > > > > > Since commit ea44d190764b ("usbip: Implement SG support to > > > > vhci-hcd and stub driver") was merged, the USB/IP driver can > > > > also handle SG. > > > > > > Not in 4.9.x. AFAICT the same story as 4.4.x > > > The patch is not strictly needed, but breaks UAS over usbip. > > > > It's in 4.9 since April this year... Same story for 4.4. > > Hi, > > now I am confused. Neither looking at the logs nor the source > I can see the commit. Top commit is > 9e48f0c28dd505e39bd136ec92a042b311b127c6 > of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git > > I am sorry for being obnoxious here and it is entirely possible that > I am stupid, but this is a discrepancy that needs to be resolved. Commit 3ae62a42090f ("UAS: fix alignment of scatter/gather segments") is the patch that is being reverted here, and it is in the following kernel releases: 4.4.180 4.9.175 4.14.118 4.19.42 5.0.15 5.1.1 5.2 And it is causing known issues, so we should revert it. Now if usbip breaks with this revert, we should add the newer patch that keeps it working properly, is that what you are thinking that ea44d190764b ("usbip: Implement SG support to vhci-hcd and stub driver") is? thanks, greg k-h