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<title>linux.git/drivers/usb/core/driver.c, branch v2.6.38</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6</title>
<updated>2011-01-10T16:14:53+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2011-01-10T16:14:53+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c8940eca75e6d1ea57f6c491a30bd1023c64c9ad'/>
<id>c8940eca75e6d1ea57f6c491a30bd1023c64c9ad</id>
<content type='text'>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  spi / PM: Support dev_pm_ops
  PM: Prototype the pm_generic_ operations
  PM / Runtime: Generic resume shouldn't set RPM_ACTIVE unconditionally
  PM: Use dev_name() in core device suspend and resume routines
  PM: Permit registration of parentless devices during system suspend
  PM: Replace the device power.status field with a bit field
  PM: Remove redundant checks from core device resume routines
  PM: Use a different list of devices for each stage of device suspend
  PM: Avoid compiler warning in pm_noirq_op()
  PM: Use pm_wakeup_pending() in __device_suspend()
  PM / Wakeup: Replace pm_check_wakeup_events() with pm_wakeup_pending()
  PM: Prevent dpm_prepare() from returning errors unnecessarily
  PM: Fix references to basic-pm-debugging.txt in drivers-testing.txt
  PM / Runtime: Add synchronous runtime interface for interrupt handlers (v3)
  PM / Hibernate: When failed, in_suspend should be reset
  PM / Hibernate: hibernation_ops-&gt;leave should be checked too
  Freezer: Fix a race during freezing of TASK_STOPPED tasks
  PM: Use proper ccflag flag in kernel/power/Makefile
  PM / Runtime: Fix comments to match runtime callback code
</content>
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<pre>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  spi / PM: Support dev_pm_ops
  PM: Prototype the pm_generic_ operations
  PM / Runtime: Generic resume shouldn't set RPM_ACTIVE unconditionally
  PM: Use dev_name() in core device suspend and resume routines
  PM: Permit registration of parentless devices during system suspend
  PM: Replace the device power.status field with a bit field
  PM: Remove redundant checks from core device resume routines
  PM: Use a different list of devices for each stage of device suspend
  PM: Avoid compiler warning in pm_noirq_op()
  PM: Use pm_wakeup_pending() in __device_suspend()
  PM / Wakeup: Replace pm_check_wakeup_events() with pm_wakeup_pending()
  PM: Prevent dpm_prepare() from returning errors unnecessarily
  PM: Fix references to basic-pm-debugging.txt in drivers-testing.txt
  PM / Runtime: Add synchronous runtime interface for interrupt handlers (v3)
  PM / Hibernate: When failed, in_suspend should be reset
  PM / Hibernate: hibernation_ops-&gt;leave should be checked too
  Freezer: Fix a race during freezing of TASK_STOPPED tasks
  PM: Use proper ccflag flag in kernel/power/Makefile
  PM / Runtime: Fix comments to match runtime callback code
</pre>
</div>
</content>
</entry>
<entry>
<title>PM: Replace the device power.status field with a bit field</title>
<updated>2010-12-24T14:02:44+00:00</updated>
<author>
<name>Rafael J. Wysocki</name>
<email>rjw@sisk.pl</email>
</author>
<published>2010-12-15T23:51:21+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=b8c76f6aed0ab7df73a6410f3f82de2c831bb144'/>
<id>b8c76f6aed0ab7df73a6410f3f82de2c831bb144</id>
<content type='text'>
The device power.status field is too complicated for its purpose
(storing the information about whether or not the device is in the
"active" state from the PM core's point of view), so replace it with
a bit field and modify all of its users accordingly.

Signed-off-by: Rafael J. Wysocki &lt;rjw@sisk.pl&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The device power.status field is too complicated for its purpose
(storing the information about whether or not the device is in the
"active" state from the PM core's point of view), so replace it with
a bit field and modify all of its users accordingly.

Signed-off-by: Rafael J. Wysocki &lt;rjw@sisk.pl&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>USB: improve uses of usb_mark_last_busy</title>
<updated>2010-11-16T22:04:22+00:00</updated>
<author>
<name>Alan Stern</name>
<email>stern@rowland.harvard.edu</email>
</author>
<published>2010-11-15T20:57:58+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c08512c761e7b9eaaab0e9167a389393f268e93c'/>
<id>c08512c761e7b9eaaab0e9167a389393f268e93c</id>
<content type='text'>
This patch (as1434) cleans up the uses of usb_mark_last_busy() in
usbcore.  The function will be called when a device is resumed and
whenever a usage count is decremented.  A call that was missing from
the hub driver is added: A hub is used whenever one of its ports gets
suspended (this prevents hubs from suspending immediately after their
last child).

In addition, the call to disable autosuspend support for new devices
by default is moved from usb_detect_quirks() (where it doesn't really
belong) into usb_new_device() along with all the other runtime-PM
initializations.  Finally, an extra pm_runtime_get_noresume() is added
to prevent new devices from autosuspending while they are being
registered.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</content>
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<pre>
This patch (as1434) cleans up the uses of usb_mark_last_busy() in
usbcore.  The function will be called when a device is resumed and
whenever a usage count is decremented.  A call that was missing from
the hub driver is added: A hub is used whenever one of its ports gets
suspended (this prevents hubs from suspending immediately after their
last child).

In addition, the call to disable autosuspend support for new devices
by default is moved from usb_detect_quirks() (where it doesn't really
belong) into usb_new_device() along with all the other runtime-PM
initializations.  Finally, an extra pm_runtime_get_noresume() is added
to prevent new devices from autosuspending while they are being
registered.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>USB: use the runtime-PM autosuspend implementation</title>
<updated>2010-11-16T22:03:41+00:00</updated>
<author>
<name>Alan Stern</name>
<email>stern@rowland.harvard.edu</email>
</author>
<published>2010-11-15T20:57:51+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=fcc4a01eb8661226e80632327673f67bf6a5840b'/>
<id>fcc4a01eb8661226e80632327673f67bf6a5840b</id>
<content type='text'>
This patch (as1428) converts USB over to the new runtime-PM core
autosuspend framework.  One slightly awkward aspect of the conversion
is that USB devices will now have two suspend-delay attributes: the
old power/autosuspend file and the new power/autosuspend_delay_ms
file.  One expresses the delay time in seconds and the other in
milliseconds, but otherwise they do the same thing.  The old attribute
can be deprecated and then removed eventually.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This patch (as1428) converts USB over to the new runtime-PM core
autosuspend framework.  One slightly awkward aspect of the conversion
is that USB devices will now have two suspend-delay attributes: the
old power/autosuspend file and the new power/autosuspend_delay_ms
file.  One expresses the delay time in seconds and the other in
milliseconds, but otherwise they do the same thing.  The old attribute
can be deprecated and then removed eventually.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>USB: make usb_mark_last_busy use pm_runtime_mark_last_busy</title>
<updated>2010-11-16T22:02:54+00:00</updated>
<author>
<name>Ming Lei</name>
<email>tom.leiming@gmail.com</email>
</author>
<published>2010-11-15T20:57:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=6ddf27cdbc218a412d7e993fdc08e30eec2042ce'/>
<id>6ddf27cdbc218a412d7e993fdc08e30eec2042ce</id>
<content type='text'>
Since the runtime-PM core already defines a .last_busy field in
device.power, this patch uses it to replace the .last_busy field
defined in usb_device and uses pm_runtime_mark_last_busy to implement
usb_mark_last_busy.

Signed-off-by: Ming Lei &lt;tom.leiming@gmail.com&gt;
Reviewed-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Since the runtime-PM core already defines a .last_busy field in
device.power, this patch uses it to replace the .last_busy field
defined in usb_device and uses pm_runtime_mark_last_busy to implement
usb_mark_last_busy.

Signed-off-by: Ming Lei &lt;tom.leiming@gmail.com&gt;
Reviewed-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>USB: use the no_callbacks flag for interfaces</title>
<updated>2010-11-16T22:02:00+00:00</updated>
<author>
<name>Ming Lei</name>
<email>tom.leiming@gmail.com</email>
</author>
<published>2010-11-15T20:56:54+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=63defa73c8c1193c1273474440c30d34c2524597'/>
<id>63defa73c8c1193c1273474440c30d34c2524597</id>
<content type='text'>
Call pm_runtime_no_callbacks to set no_callbacks flag for USB
interfaces.  Since interfaces cannot be power-managed separately from
their parent devices, there's no reason for the runtime-PM core to
invoke any callbacks for them.

Signed-off-by: Ming Lei &lt;tom.leiming@gmail.com&gt;
Reviewed-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Call pm_runtime_no_callbacks to set no_callbacks flag for USB
interfaces.  Since interfaces cannot be power-managed separately from
their parent devices, there's no reason for the runtime-PM core to
invoke any callbacks for them.

Signed-off-by: Ming Lei &lt;tom.leiming@gmail.com&gt;
Reviewed-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>USB: do not print -ESHUTDOWN message if usb at otg device mode</title>
<updated>2010-10-22T17:22:05+00:00</updated>
<author>
<name>Peter Chen</name>
<email>peter.chen@freescale.com</email>
</author>
<published>2010-09-27T08:43:25+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=7491f13367919d97525b73b1fd38801ac83aac06'/>
<id>7491f13367919d97525b73b1fd38801ac83aac06</id>
<content type='text'>
At otg device mode, the otg host resume should do no-op during
system resume, otherwise, the otg device will be treated as a
host for enumeration.

So, the otg host driver returns -ESHUTDOWN if it detects the
current usb mode is device mode. The host driver has to return
-ESHUTDOWN, otherwise, the usb_hc_died will be called.

Signed-off-by: Peter Chen &lt;peter.chen@freescale.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</content>
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<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
At otg device mode, the otg host resume should do no-op during
system resume, otherwise, the otg device will be treated as a
host for enumeration.

So, the otg host driver returns -ESHUTDOWN if it detects the
current usb mode is device mode. The host driver has to return
-ESHUTDOWN, otherwise, the usb_hc_died will be called.

Signed-off-by: Peter Chen &lt;peter.chen@freescale.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>USB: remove fake "address-of" expressions</title>
<updated>2010-08-10T21:35:45+00:00</updated>
<author>
<name>Alan Stern</name>
<email>stern@rowland.harvard.edu</email>
</author>
<published>2010-08-05T17:12:14+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=b409214c683ed06c26e2cdad0be546ad11463354'/>
<id>b409214c683ed06c26e2cdad0be546ad11463354</id>
<content type='text'>
Fake "address-of" expressions that evaluate to NULL generally confuse
readers and can provoke compiler warnings.  This patch (as1412)
removes three such fake expressions, using "#ifdef"s in their place.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Fake "address-of" expressions that evaluate to NULL generally confuse
readers and can provoke compiler warnings.  This patch (as1412)
removes three such fake expressions, using "#ifdef"s in their place.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>USB: core driver: Fix Coding Styles</title>
<updated>2010-08-10T21:35:34+00:00</updated>
<author>
<name>csanchez@neurowork.net</name>
<email>csanchez@neurowork.net</email>
</author>
<published>2010-05-25T15:38:22+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=16be57259f4e664e4e423caa896963de1b7b8d14'/>
<id>16be57259f4e664e4e423caa896963de1b7b8d14</id>
<content type='text'>
Fixed coding styles in the core usb driver.

Signed-off-by: Carlos Sánchez Acosta &lt;csanchez@neurowork.net&gt;
Signed-off-by: Alejandro Sánchez Acosta &lt;asanchez@neurowork.net&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Fixed coding styles in the core usb driver.

Signed-off-by: Carlos Sánchez Acosta &lt;csanchez@neurowork.net&gt;
Signed-off-by: Alejandro Sánchez Acosta &lt;asanchez@neurowork.net&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>USB: obey the sysfs power/wakeup setting</title>
<updated>2010-06-30T15:16:06+00:00</updated>
<author>
<name>Alan Stern</name>
<email>stern@rowland.harvard.edu</email>
</author>
<published>2010-06-22T20:14:48+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=48826626263d4a61d06fd8c5805da31f925aefa0'/>
<id>48826626263d4a61d06fd8c5805da31f925aefa0</id>
<content type='text'>
This patch (as1403) is a partial reversion of an earlier change
(commit 5f677f1d45b2bf08085bbba7394392dfa586fa8e "USB: fix remote
wakeup settings during system sleep").  After hearing from a user, I
realized that remote wakeup should be enabled during system sleep
whenever userspace allows it, and not only if a driver requests it
too.

Indeed, there could be a device with no driver, that does nothing but
generate a wakeup request when the user presses a button.  Such a
device should be allowed to do its job.

The problem fixed by the earlier patch -- device generating a wakeup
request for no reason, causing system suspend to abort -- was also
addressed by a later patch ("USB: don't enable remote wakeup by
default", accepted but not yet merged into mainline).  The device
won't be able to generate the bogus wakeup requests because it will be
disabled for remote wakeup by default.  Hence this reversion will not
re-introduce any old problems.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Cc: stable &lt;stable@kernel.org&gt; [.34]
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;


</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This patch (as1403) is a partial reversion of an earlier change
(commit 5f677f1d45b2bf08085bbba7394392dfa586fa8e "USB: fix remote
wakeup settings during system sleep").  After hearing from a user, I
realized that remote wakeup should be enabled during system sleep
whenever userspace allows it, and not only if a driver requests it
too.

Indeed, there could be a device with no driver, that does nothing but
generate a wakeup request when the user presses a button.  Such a
device should be allowed to do its job.

The problem fixed by the earlier patch -- device generating a wakeup
request for no reason, causing system suspend to abort -- was also
addressed by a later patch ("USB: don't enable remote wakeup by
default", accepted but not yet merged into mainline).  The device
won't be able to generate the bogus wakeup requests because it will be
disabled for remote wakeup by default.  Hence this reversion will not
re-introduce any old problems.

Signed-off-by: Alan Stern &lt;stern@rowland.harvard.edu&gt;
Cc: stable &lt;stable@kernel.org&gt; [.34]
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@suse.de&gt;


</pre>
</div>
</content>
</entry>
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