From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sarah Sharp Subject: Re: [RFC PATCH] usb/acpi: Add support usb port power off mechanism for device fixed on the motherboard Date: Fri, 11 May 2012 13:15:07 -0700 Message-ID: <20120511201507.GG18754@xanatos> References: <4FAD3A51.4010803@intel.com> <4CFBC02C07DA244CA19D6815A05BE6EE0A6910@SHSMSX101.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga09.intel.com ([134.134.136.24]:63280 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932805Ab2EKUPL (ORCPT ); Fri, 11 May 2012 16:15:11 -0400 Content-Disposition: inline In-Reply-To: <4CFBC02C07DA244CA19D6815A05BE6EE0A6910@SHSMSX101.ccr.corp.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Lan, Tianyu" Cc: Alan Stern , "lenb@kernel.org" , "gregkh@linuxfoundation.org" , "linux-acpi@vger.kernel.org" , "linux-usb@vger.kernel.org" On Fri, May 11, 2012 at 07:54:04PM +0000, Lan, Tianyu wrote: > On 2012/5/12 1:44, Alan Stern wrote: > > This doesn't matter. Disconnections will be handled by > > usb_reset_and_verify_device(), when it is called by > > finish_port_resume(). > This will cause the device to be re-enumerated. Just like > unplugged and plugged a device. I think this is not what > we want. Disconnect and create the same device. device > num is also change. Tianyu, do you have CONFIG_USB_PERSIST turned on? Alan, do you know if that will that only help in this case after the host controller PCI device is in D3hot? Sarah Sharp