From: Aaron Lu <aaron.lu@intel.com>
To: Oliver Neukum <oneukum@suse.de>
Cc: Aaron Lu <aaron.lwe@gmail.com>,
Alan Stern <stern@rowland.harvard.edu>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Jeff Garzik <jgarzik@pobox.com>,
linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org,
linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v6 5/7] scsi: pm: add may_power_off flag
Date: Thu, 6 Sep 2012 09:52:01 +0800 [thread overview]
Message-ID: <20120906015200.GA1866@mint-spring.sh.intel.com> (raw)
In-Reply-To: <1539628.e0bNDi5Td8@linux-lqwf.site>
On Tue, Sep 04, 2012 at 06:01:22PM +0200, Oliver Neukum wrote:
> On Tuesday 04 September 2012 22:24:38 Aaron Lu wrote:
> > From: Aaron Lu <aaron.lu@intel.com>
> >
> > Add a new flag may_power_off for scsi device, it gives the user a chance
> > to control when the device is runtime suspended, can we remove its power
> > if possible.
> >
> > And if the device can be powered off(reflected by can_power_off flag,
> > determined by individual driver), create a sysfs entry named
> > may_power_off to let user control the flag.
>
> Do we really need yet another interface to user space?
We do not have a way to let user decide when device is runtime
suspended, can we remove its power, so I added this flag. PCI subsystem
has a similar flag named d3cold_allowed.
This flag can disable the power off of ZPODD capable devices, or put a
rotational disk into powered off if user so choose.
Thanks,
Aaron
next prev parent reply other threads:[~2012-09-06 1:52 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 14:24 [PATCH v6 0/7] ZPODD patches Aaron Lu
2012-09-04 14:24 ` [PATCH v6 1/7] scsi: sr: support runtime pm for ODD Aaron Lu
2012-09-04 15:57 ` Oliver Neukum
2012-09-04 17:59 ` Alan Stern
2012-09-04 18:47 ` Oliver Neukum
2012-09-05 15:22 ` Aaron Lu
2012-09-05 16:08 ` Alan Stern
2012-09-05 22:49 ` Aaron Lu
2012-09-06 15:06 ` Alan Stern
2012-09-06 15:25 ` Oliver Neukum
2012-09-06 17:08 ` Alan Stern
2012-09-06 18:06 ` Oliver Neukum
2012-09-06 18:50 ` Alan Stern
2012-09-10 9:16 ` Aaron Lu
2012-09-10 10:45 ` Oliver Neukum
2012-09-11 6:44 ` Aaron Lu
2012-09-11 8:55 ` Oliver Neukum
2012-09-11 9:24 ` Aaron Lu
2012-09-11 9:30 ` Oliver Neukum
2012-09-11 11:11 ` Aaron Lu
2012-09-11 12:10 ` Oliver Neukum
2012-09-11 12:31 ` Aaron Lu
2012-09-11 12:35 ` Oliver Neukum
2012-09-11 12:13 ` Aaron Lu
2012-09-07 14:53 ` Aaron Lu
2012-09-07 15:41 ` Alan Stern
2012-09-05 18:06 ` Oliver Neukum
2012-09-06 5:55 ` Aaron Lu
2012-09-06 5:17 ` Aaron Lu
2012-09-04 14:24 ` [PATCH v6 2/7] block: genhd: export disk_(un)block_events Aaron Lu
2012-09-04 14:24 ` [PATCH v6 3/7] scsi: sr: block events checking when suspended for zpodd Aaron Lu
2012-09-04 14:24 ` [PATCH v6 4/7] libata: acpi: set can_power_off for both ODD and HD Aaron Lu
2012-09-07 2:37 ` Jeff Garzik
2012-09-04 14:24 ` [PATCH v6 5/7] scsi: pm: add may_power_off flag Aaron Lu
2012-09-04 16:01 ` Oliver Neukum
2012-09-06 1:52 ` Aaron Lu [this message]
2012-09-04 14:24 ` [PATCH v6 6/7] scsi: sr: use may_power_off Aaron Lu
2012-09-04 14:24 ` [PATCH v6 7/7] libata: acpi: respect may_power_off flag Aaron Lu
2012-09-07 2:38 ` Jeff Garzik
2012-09-13 2:42 ` [PATCH v6 0/7] ZPODD patches Jack Wang
2012-09-13 3:20 ` Aaron Lu
2012-09-13 8:15 ` Jack Wang
2012-09-13 8:30 ` Aaron Lu
2012-09-13 8:39 ` Jack Wang
2012-09-13 8:56 ` Aaron Lu
2012-09-13 9:01 ` James Bottomley
2012-09-13 9:12 ` Jack Wang
2012-09-13 9:19 ` [PATCH " Aaron Lu
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