Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3762204imu; Mon, 7 Jan 2019 09:00:58 -0800 (PST) X-Google-Smtp-Source: ALg8bN6Dv+cOjyKxfaFwob5cCUEm+JtxTh2uD1D2ERdFVzKVeL+CnTD6MhJp0PBFjknjgnliKja/ X-Received: by 2002:a17:902:2c83:: with SMTP id n3mr62615243plb.104.1546880458627; Mon, 07 Jan 2019 09:00:58 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1546880458; cv=none; d=google.com; s=arc-20160816; b=hJZAoWIO7fjgIFWcCXcNVzQDMffug3/LpYPnw6vhIiWdGylKDp3ExgmkTIaGeOUTZr /7bxAm4od5qNt1UJLAI6M11qcSkEfPEJ7AtV5h2epbNvHe5Re2eb4/fgWSIp7rsxtXJG V6WWUeClyWN+glfpqlTTuGbs6zRWBGl0YyqDpq468jfbmyo50wzEmS77cTJmjdVXmEkp vbTyayUOrvWgxQ9k5hVsZqD61pA5zpBDg9ALGG6LChz1RvCIv8+Z7DxjiRo7gs91SmYg qXi0tupX3R5vW4SpFgpyWjpIdiISsJZ4e3gpWn5DmWwStYEZs34r38tcALTnjpkl9Hap FmBQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=UGVvykVHDJlCGCF53C8FWLVbxliJdGrrD6J6nCHxxW4=; b=kZZII3WEOW3f+5En0UEuhLaF7UX3da79ayqYoh0mVDmSbuaciaR5O1EJ6bFJ7owiXd q9LUFe4aB5OM8D07AI6lMrKrO31eR8AuLFXFVAVNhRSRndjuGMVyp0lIysB1soPZWiuG 2IYj+73tP+aNBzh2k363/svYUZWw+7ipMNw0M+8nG4UXWRCyPpGXrTcC9jRTZ4j7e2It Gx5YsqC2tjmxeXtih2w9BTgkdLOoAXHyZ/Sudx+hiZEdyY4oU9MM36mag/Omb1ItiCkD y7TSnaf+W39xSEcyuRPCbcqD6U/1333sVRc65PwgDnfjA3giG2RHgPDuM4J6OqMGSSgi raYA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=rZJ2nRoD; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o22si9990077pgb.584.2019.01.07.09.00.42; Mon, 07 Jan 2019 09:00:58 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=rZJ2nRoD; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727950AbfAGQTJ (ORCPT + 99 others); Mon, 7 Jan 2019 11:19:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:38488 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726864AbfAGQTJ (ORCPT ); Mon, 7 Jan 2019 11:19:09 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 6AF8D2147C; Mon, 7 Jan 2019 16:19:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1546877948; bh=7i7bSf3+28hwU+JQF6kEntEoezVRfYszvSYXYHYr/CA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=rZJ2nRoD7PjVq+ybfZHAgNL7zL4ontvQB7ZI+QwQXxMMeLsfd4Tgd1D25hEzZjWzq jmmU4OFVmVxWkLU0EthiuxC+t0Rj9KN1mLdSYY+RMQtJnHsypM89hADjbvYlkgvnCa X9+rRJCF6McI1M/gcProGW5qgucq5AJ6nUXffXEo= Date: Mon, 7 Jan 2019 17:19:06 +0100 From: Greg KH To: Ben Dooks Cc: stern@rowland.harvard.edu, linux-usb@vger.kernel.org, linux-kernel@lists.codethink.co.uk, linux-kernel@vger.kernel.org, Ben Dooks Subject: Re: [PATCH] USB: host: ehci: allow tine of highspeed nak-count Message-ID: <20190107161906.GC2292@kroah.com> References: <20181114171315.27549-1-ben-linux@fluff.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181114171315.27549-1-ben-linux@fluff.org> User-Agent: Mutt/1.11.1 (2018-12-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 14, 2018 at 05:13:15PM +0000, Ben Dooks wrote: > From: Ben Dooks > > At least some systems benefit with less scheduling if the NAK count > value is set higher than the default 4. For instance a Tegra3 with > an SMSC9512 showed less interrupt load when this was changed to 14. > > To allow the changing of this value, add a sysfs node to each of > the controllers to allow run-time changing. That's going to be a pain, why can you not just figure this out at runtime and adjust it that way? Also, you can't add a sysfs file and not also add a Documentation/API/ update :( Can you fix this up to work without needing manual adjustments? thanks, greg k-h