From: Alan Stern <stern@rowland.harvard.edu>
To: Felipe Balbi <balbi@ti.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>, <JBottomley@parallels.com>,
<linux-scsi@vger.kernel.org>, <davem@davemloft.net>,
<netdev@vger.kernel.org>,
Doug Thompson <dougthompson@xmission.com>,
<linux-edac@vger.kernel.org>, <rjw@sisk.pl>,
<linux-pm@vger.kernel.org>
Subject: Re: SYSFS "errors"
Date: Mon, 18 Feb 2013 16:48:06 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1302181644260.6790-100000@netrider.rowland.org> (raw)
In-Reply-To: <20130218184633.GC10755@arwen.pp.htv.fi>
On Mon, 18 Feb 2013, Felipe Balbi wrote:
> Hi, On Mon, Feb 18, 2013 at 09:49:16AM -0800, Greg KH wrote:
> > > Input/output error - /sys/devices/cpu/power/autosuspend_delay_ms
> >
> > The issue with this file is, if the power.use_autosuspend flag is not
> > set for the device, then it can't be read or written to. This flag
> > changes dynamically with the system state
> > (__pm_runtime_use_autosuspend() can change it), so we can't just not
> > show the file if the flag is not set properly, sorry.
> >
> > So the "error" is correct here, as is the 0644 file value.
>
> hmm... we could create the file at pm_runtime_enable() time and remove
> it on pm_runtime_disable() time, no ? Addin Rafael to Cc
In theory this could be done, although the times would be when runtime
autosuspend is turned on or off, not when pm_runtime_enable is called.
Alan Stern
WARNING: multiple messages have this Message-ID (diff)
From: Alan Stern <stern@rowland.harvard.edu>
To: Felipe Balbi <balbi@ti.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
JBottomley@parallels.com, linux-scsi@vger.kernel.org,
davem@davemloft.net, netdev@vger.kernel.org,
Doug Thompson <dougthompson@xmission.com>,
linux-edac@vger.kernel.org, rjw@sisk.pl,
linux-pm@vger.kernel.org
Subject: Re: SYSFS "errors"
Date: Mon, 18 Feb 2013 16:48:06 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1302181644260.6790-100000@netrider.rowland.org> (raw)
In-Reply-To: <20130218184633.GC10755@arwen.pp.htv.fi>
On Mon, 18 Feb 2013, Felipe Balbi wrote:
> Hi, On Mon, Feb 18, 2013 at 09:49:16AM -0800, Greg KH wrote:
> > > Input/output error - /sys/devices/cpu/power/autosuspend_delay_ms
> >
> > The issue with this file is, if the power.use_autosuspend flag is not
> > set for the device, then it can't be read or written to. This flag
> > changes dynamically with the system state
> > (__pm_runtime_use_autosuspend() can change it), so we can't just not
> > show the file if the flag is not set properly, sorry.
> >
> > So the "error" is correct here, as is the 0644 file value.
>
> hmm... we could create the file at pm_runtime_enable() time and remove
> it on pm_runtime_disable() time, no ? Addin Rafael to Cc
In theory this could be done, although the times would be when runtime
autosuspend is turned on or off, not when pm_runtime_enable is called.
Alan Stern
next prev parent reply other threads:[~2013-02-18 21:48 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-18 15:33 SYSFS "errors" Felipe Balbi
2013-02-18 15:50 ` Greg KH
2013-02-18 15:52 ` Felipe Balbi
2013-02-18 17:13 ` Greg KH
2013-02-18 17:27 ` Felipe Balbi
2013-02-18 17:45 ` Borislav Petkov
2013-02-18 18:47 ` Felipe Balbi
2013-02-18 19:40 ` Borislav Petkov
2013-02-18 20:04 ` Felipe Balbi
2013-02-18 17:49 ` Greg KH
2013-02-18 18:46 ` Felipe Balbi
2013-02-18 18:46 ` Felipe Balbi
2013-02-18 19:46 ` Mauro Carvalho Chehab
2013-02-18 19:46 ` Mauro Carvalho Chehab
2013-02-18 20:05 ` Felipe Balbi
2013-02-18 20:05 ` Felipe Balbi
2013-02-18 21:47 ` Mauro Carvalho Chehab
2013-02-18 21:47 ` Mauro Carvalho Chehab
2013-02-18 21:54 ` Greg KH
2013-02-18 22:13 ` Borislav Petkov
2013-02-18 22:26 ` Greg KH
2013-02-18 22:44 ` Borislav Petkov
2013-02-19 10:03 ` Mauro Carvalho Chehab
2013-02-19 10:11 ` Felipe Balbi
2013-02-19 10:11 ` Felipe Balbi
2013-02-19 11:11 ` Mauro Carvalho Chehab
2013-02-19 11:11 ` Mauro Carvalho Chehab
2013-02-19 11:43 ` Borislav Petkov
2013-02-19 12:16 ` Mauro Carvalho Chehab
2013-02-19 12:35 ` Borislav Petkov
2013-02-19 12:46 ` Mauro Carvalho Chehab
2013-02-19 13:06 ` Borislav Petkov
2013-02-19 13:15 ` Felipe Balbi
2013-02-19 13:15 ` Felipe Balbi
2013-02-19 13:28 ` Borislav Petkov
2013-02-19 13:38 ` Felipe Balbi
2013-02-19 13:38 ` Felipe Balbi
2013-02-19 13:50 ` Mauro Carvalho Chehab
2013-02-19 13:50 ` Mauro Carvalho Chehab
2013-02-19 13:55 ` Borislav Petkov
2013-02-19 13:50 ` Borislav Petkov
2013-02-19 13:58 ` Hannes Reinecke
2013-02-19 14:10 ` Borislav Petkov
2013-02-19 14:14 ` Mauro Carvalho Chehab
2013-02-19 14:19 ` Felipe Balbi
2013-02-19 14:19 ` Felipe Balbi
2013-02-19 14:35 ` Mauro Carvalho Chehab
2013-02-19 14:50 ` Borislav Petkov
2013-02-19 14:53 ` Felipe Balbi
2013-02-19 14:53 ` Felipe Balbi
2013-02-19 13:42 ` Mauro Carvalho Chehab
2013-02-18 21:48 ` Alan Stern [this message]
2013-02-18 21:48 ` Alan Stern
2013-02-18 21:57 ` Felipe Balbi
2013-02-18 21:57 ` Felipe Balbi
2013-02-19 7:41 ` Alexander Stein
2013-02-19 10:12 ` Felipe Balbi
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