From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lin Ming Subject: Re: [PATCH 1/3] [SCSI] sd: fix runtime status check in sd_shutdown Date: Thu, 15 Dec 2011 02:34:24 +0800 Message-ID: <1323887664.7655.5.camel@hp6530s> References: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Alan Stern Cc: Jeff Garzik , James Bottomley , Tejun Heo , "linux-kernel@vger.kernel.org" , "linux-ide@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "linux-pm@vger.kernel.org" List-Id: linux-scsi@vger.kernel.org On Thu, 2011-12-15 at 00:49 +0800, Alan Stern wrote: > On Wed, 14 Dec 2011, Lin Ming wrote: > > > Commit af8db15 disabled device's runtime PM during shutdown. > > So sd's runtime status can't be checked with pm_runtime_suspended(dev) > > any more. > > > > Fix it by checking runtime status with pm_runtime_status_suspended(dev). > > > > Signed-off-by: Lin Ming > > --- > > drivers/scsi/sd.c | 7 ++++++- > > 1 files changed, 6 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c > > index 7b3f807..284b087 100644 > > --- a/drivers/scsi/sd.c > > +++ b/drivers/scsi/sd.c > > @@ -2742,7 +2742,12 @@ static void sd_shutdown(struct device *dev) > > if (!sdkp) > > return; /* this can happen */ > > > > - if (pm_runtime_suspended(dev)) > > + /* > > + * Check runtime status with pm_runtime_status_suspended(dev) > > + * instead of pm_runtime_suspended(dev), > > + * because device_shutdown() has disabled the device's runtime PM. > > + */ > > + if (pm_runtime_status_suspended(dev)) > > goto exit; > > > > if (sdkp->WCE) { > > This is no longer needed. See commit > fe6b91f47080eb17d21cbf2a39311877d57f6938 (PM / Driver core: leave > runtime PM enabled during system shutdown). I'll remove this patch. Thanks. > > Alan Stern >