From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Lu Subject: Re: [PATCH v13 1/9] scsi: sr: support runtime pm Date: Tue, 22 Jan 2013 10:25:31 +0800 Message-ID: <20130122022531.GA20211@aaronlu.sh.intel.com> References: <50FA5F67.4080102@intel.com> <20130121091104.GA11010@aaronlu.sh.intel.com> <1671780.QshOn4REzF@linux-5eaq.site> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga11.intel.com ([192.55.52.93]:25272 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752900Ab3AVCYz (ORCPT ); Mon, 21 Jan 2013 21:24:55 -0500 Content-Disposition: inline In-Reply-To: <1671780.QshOn4REzF@linux-5eaq.site> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Oliver Neukum Cc: Julian Calaby , Alan Stern , James Bottomley , Jeff Garzik , "Rafael J. Wysocki" , Tejun Heo , Aaron Lu , Jeff Wu , linux-ide@vger.kernel.org, linux-pm@vger.kernel.org, linux-scsi@vger.kernel.org, linux-acpi@vger.kernel.org On Mon, Jan 21, 2013 at 03:56:43PM +0100, Oliver Neukum wrote: > On Monday 21 January 2013 17:11:04 Aaron Lu wrote: > > It is not easy for the OS to tell if the drive is being used or not > > sometimes > > > > Alan has reminded me it is possible for an app to open the block device > > file(/dev/sr0), issue a command(play audio), then close the device file. > > From the OS' point of view, we think nobody is using it. But actually, > > the drive is playing cd for the user, so we can't suspend the device. > > Are there drives that support ZPODD and have an audio output? I'm afraid I don't know, since there are so many ODD makers. But at least we can say, the SPEC doesn't forbid it. Thanks, Aaron