<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/drivers/acpi, branch v3.12.41</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>ACPICA: Update to GPIO region handler interface.</title>
<updated>2015-04-09T12:13:34+00:00</updated>
<author>
<name>Bob Moore</name>
<email>Robert.Moore@intel.com</email>
</author>
<published>2014-09-23T02:35:47+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=05436bbe5e062cf91c79143eb01fd5006b653cbb'/>
<id>05436bbe5e062cf91c79143eb01fd5006b653cbb</id>
<content type='text'>
commit 75ec6e55f1384548311a13ce4fcb39c516053314 upstream.

Changes to correct several GPIO issues:

1) The update_rule in a GPIO field definition is now ignored;
a read-modify-write operation is never performed for GPIO fields.
(Internally, this means that the field assembly/disassembly
code is completely bypassed for GPIO.)

2) The Address parameter passed to a GPIO region handler is
now the bit offset of the field from a previous Connection()
operator. Thus, it becomes a "Pin Number Index" into the
Connection() resource descriptor.

3) The bit_width parameter passed to a GPIO region handler is
now the exact bit width of the GPIO field. Thus, it can be
interpreted as "number of pins".

Overall, we can now say that the region handler interface
to GPIO handlers is a raw "bit/pin" addressed interface, not
a byte-addressed interface like the system_memory handler interface.

Signed-off-by: Bob Moore &lt;robert.moore@intel.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.15+ &lt;stable@vger.kernel.org&gt; # 3.15+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 75ec6e55f1384548311a13ce4fcb39c516053314 upstream.

Changes to correct several GPIO issues:

1) The update_rule in a GPIO field definition is now ignored;
a read-modify-write operation is never performed for GPIO fields.
(Internally, this means that the field assembly/disassembly
code is completely bypassed for GPIO.)

2) The Address parameter passed to a GPIO region handler is
now the bit offset of the field from a previous Connection()
operator. Thus, it becomes a "Pin Number Index" into the
Connection() resource descriptor.

3) The bit_width parameter passed to a GPIO region handler is
now the exact bit width of the GPIO field. Thus, it can be
interpreted as "number of pins".

Overall, we can now say that the region handler interface
to GPIO handlers is a raw "bit/pin" addressed interface, not
a byte-addressed interface like the system_memory handler interface.

Signed-off-by: Bob Moore &lt;robert.moore@intel.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.15+ &lt;stable@vger.kernel.org&gt; # 3.15+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI: Run fixed event device notifications in process context</title>
<updated>2015-04-09T12:13:33+00:00</updated>
<author>
<name>Lan Tianyu</name>
<email>tianyu.lan@intel.com</email>
</author>
<published>2014-08-25T23:29:24+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=c084542fe8a21054da221cb9caff8976bd1972f3'/>
<id>c084542fe8a21054da221cb9caff8976bd1972f3</id>
<content type='text'>
commit 236105db632c6279a020f78c83e22eaef746006b upstream.

Currently, notify callbacks for fixed button events are run from
interrupt context.  That is not necessary and after commit 0bf6368ee8f2
(ACPI / button: Add ACPI Button event via netlink routine) it causes
netlink routines to be called from interrupt context which is not
correct.

Also, that is different from non-fixed device events (including
non-fixed button events) whose notify callbacks are all executed from
process context.

For the above reasons, make fixed button device notify callbacks run
in process context which will avoid the deadlock when using netlink
to report button events to user space.

Fixes: 0bf6368ee8f2 (ACPI / button: Add ACPI Button event via netlink routine)
Link: https://lkml.org/lkml/2014/8/21/606
Reported-by: Benjamin Block &lt;bebl@mageta.org&gt;
Reported-by: Knut Petersen &lt;Knut_Petersen@t-online.de&gt;
Signed-off-by: Lan Tianyu &lt;tianyu.lan@intel.com&gt;
[rjw: Function names, subject and changelog.]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 236105db632c6279a020f78c83e22eaef746006b upstream.

Currently, notify callbacks for fixed button events are run from
interrupt context.  That is not necessary and after commit 0bf6368ee8f2
(ACPI / button: Add ACPI Button event via netlink routine) it causes
netlink routines to be called from interrupt context which is not
correct.

Also, that is different from non-fixed device events (including
non-fixed button events) whose notify callbacks are all executed from
process context.

For the above reasons, make fixed button device notify callbacks run
in process context which will avoid the deadlock when using netlink
to report button events to user space.

Fixes: 0bf6368ee8f2 (ACPI / button: Add ACPI Button event via netlink routine)
Link: https://lkml.org/lkml/2014/8/21/606
Reported-by: Benjamin Block &lt;bebl@mageta.org&gt;
Reported-by: Knut Petersen &lt;Knut_Petersen@t-online.de&gt;
Signed-off-by: Lan Tianyu &lt;tianyu.lan@intel.com&gt;
[rjw: Function names, subject and changelog.]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / video: Load the module even if ACPI is disabled</title>
<updated>2015-03-16T13:58:20+00:00</updated>
<author>
<name>Chris Wilson</name>
<email>chris@chris-wilson.co.uk</email>
</author>
<published>2015-03-01T10:41:37+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=fec983fe4a8885f402ba647d9c476e6b644ce787'/>
<id>fec983fe4a8885f402ba647d9c476e6b644ce787</id>
<content type='text'>
commit 6e17cb12881ba8d5e456b89f072dc6b70048af36 upstream.

i915.ko depends upon the acpi/video.ko module and so refuses to load if
ACPI is disabled at runtime if for example the BIOS is broken beyond
repair. acpi/video provides an optional service for i915.ko and so we
should just allow the modules to load, but do no nothing in order to let
the machines boot correctly.

Reported-by: Bill Augur &lt;bill-auger@programmer.net&gt;
Signed-off-by: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;
Cc: Jani Nikula &lt;jani.nikula@intel.com&gt;
Acked-by: Aaron Lu &lt;aaron.lu@intel.com&gt;
[ rjw: Fixed up the new comment in acpi_video_init() ]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 6e17cb12881ba8d5e456b89f072dc6b70048af36 upstream.

i915.ko depends upon the acpi/video.ko module and so refuses to load if
ACPI is disabled at runtime if for example the BIOS is broken beyond
repair. acpi/video provides an optional service for i915.ko and so we
should just allow the modules to load, but do no nothing in order to let
the machines boot correctly.

Reported-by: Bill Augur &lt;bill-auger@programmer.net&gt;
Signed-off-by: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;
Cc: Jani Nikula &lt;jani.nikula@intel.com&gt;
Acked-by: Aaron Lu &lt;aaron.lu@intel.com&gt;
[ rjw: Fixed up the new comment in acpi_video_init() ]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI: Fix bug when ACPI reset register is implemented in system memory</title>
<updated>2015-02-16T15:11:00+00:00</updated>
<author>
<name>Randy Wright</name>
<email>rwright@hp.com</email>
</author>
<published>2014-06-04T15:55:59+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=526d09dfa647cacd71d7271bb30bf058f6cf72a2'/>
<id>526d09dfa647cacd71d7271bb30bf058f6cf72a2</id>
<content type='text'>
commit a4714a898e85205e1118ec923cde43d88eb105f6 upstream.

Use acpi_os_map_generic_address to pre-map the reset register if it is
memory mapped, thereby preventing the BUG_ON() in line 1319 of
mm/vmalloc.c from triggering during panic-triggered reboots.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=77131
Signed-off-by: Randy Wright &lt;rwright@hp.com&gt;
Signed-off-by: David E. Box &lt;david.e.box@linux.intel.com&gt;
[rjw: Changelog, simplified code]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;

Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit a4714a898e85205e1118ec923cde43d88eb105f6 upstream.

Use acpi_os_map_generic_address to pre-map the reset register if it is
memory mapped, thereby preventing the BUG_ON() in line 1319 of
mm/vmalloc.c from triggering during panic-triggered reboots.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=77131
Signed-off-by: Randy Wright &lt;rwright@hp.com&gt;
Signed-off-by: David E. Box &lt;david.e.box@linux.intel.com&gt;
[rjw: Changelog, simplified code]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;

Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / osl: speedup grace period in acpi_os_map_cleanup</title>
<updated>2015-01-26T13:39:20+00:00</updated>
<author>
<name>Konstantin Khlebnikov</name>
<email>koct9i@gmail.com</email>
</author>
<published>2014-11-09T09:53:37+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=b3959c772ebaf1efedb44085c5bc43129704274b'/>
<id>b3959c772ebaf1efedb44085c5bc43129704274b</id>
<content type='text'>
commit 74b51ee152b6d99e61ba329799a039453fb9438f upstream.

ACPI maintains cache of ioremap regions to speed up operations and
access to them from irq context where ioremap() calls aren't allowed.
This code abuses synchronize_rcu() on unmap path for synchronization
with fast-path in acpi_os_read/write_memory which uses this cache.

Since v3.10 CPUs are allowed to enter idle state even if they have RCU
callbacks queued, see commit c0f4dfd4f90f1667d234d21f15153ea09a2eaa66
("rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks").
That change caused problems with nvidia proprietary driver which calls
acpi_os_map/unmap_generic_address several times during initialization.
Each unmap calls synchronize_rcu and adds significant delay. Totally
initialization is slowed for a couple of seconds and that is enough to
trigger timeout in hardware, gpu decides to "fell off the bus". Widely
spread workaround is reducing "rcu_idle_gp_delay" from 4 to 1 jiffy.

This patch replaces synchronize_rcu() with synchronize_rcu_expedited()
which is much faster.

Link: https://devtalk.nvidia.com/default/topic/567297/linux/linux-3-10-driver-crash/
Signed-off-by: Konstantin Khlebnikov &lt;koct9i@gmail.com&gt;
Reported-and-tested-by: Alexander Monakov &lt;amonakov@gmail.com&gt;
Reviewed-by: Paul E. McKenney &lt;paulmck@linux.vnet.ibm.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 74b51ee152b6d99e61ba329799a039453fb9438f upstream.

ACPI maintains cache of ioremap regions to speed up operations and
access to them from irq context where ioremap() calls aren't allowed.
This code abuses synchronize_rcu() on unmap path for synchronization
with fast-path in acpi_os_read/write_memory which uses this cache.

Since v3.10 CPUs are allowed to enter idle state even if they have RCU
callbacks queued, see commit c0f4dfd4f90f1667d234d21f15153ea09a2eaa66
("rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks").
That change caused problems with nvidia proprietary driver which calls
acpi_os_map/unmap_generic_address several times during initialization.
Each unmap calls synchronize_rcu and adds significant delay. Totally
initialization is slowed for a couple of seconds and that is enough to
trigger timeout in hardware, gpu decides to "fell off the bus". Widely
spread workaround is reducing "rcu_idle_gp_delay" from 4 to 1 jiffy.

This patch replaces synchronize_rcu() with synchronize_rcu_expedited()
which is much faster.

Link: https://devtalk.nvidia.com/default/topic/567297/linux/linux-3-10-driver-crash/
Signed-off-by: Konstantin Khlebnikov &lt;koct9i@gmail.com&gt;
Reported-and-tested-by: Alexander Monakov &lt;amonakov@gmail.com&gt;
Reviewed-by: Paul E. McKenney &lt;paulmck@linux.vnet.ibm.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / EC: Fix regression due to conflicting firmware behavior between Samsung and Acer.</title>
<updated>2014-11-05T09:03:18+00:00</updated>
<author>
<name>Lv Zheng</name>
<email>lv.zheng@intel.com</email>
</author>
<published>2014-10-29T03:33:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=92f4ce188b5d85a7c26809b830994caf5625b3e8'/>
<id>92f4ce188b5d85a7c26809b830994caf5625b3e8</id>
<content type='text'>
commit 79149001105f18bd2285ada109f9229ea24a7571 upstream.

It is reported that Samsung laptops that need to poll events are broken by
the following commit:
 Commit 3afcf2ece453e1a8c2c6de19cdf06da3772a1b08
 Subject: ACPI / EC: Add support to disallow QR_EC to be issued when SCI_EVT isn't set

The behaviors of the 2 vendor firmwares are conflict:
 1. Acer: OSPM shouldn't issue QR_EC unless SCI_EVT is set, firmware
         automatically sets SCI_EVT as long as there is event queued up.
 2. Samsung: OSPM should issue QR_EC whatever SCI_EVT is set, firmware
            returns 0 when there is no event queued up.

This patch is a quick fix to distinguish the behaviors to make Acer
behavior only effective for Acer EC firmware so that the breakages on
Samsung EC firmware can be avoided.

Fixes: 3afcf2ece453 (ACPI / EC: Add support to disallow QR_EC to be issued ...)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=44161
Reported-and-tested-by: Ortwin Glück &lt;odi@odi.ch&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.17+ &lt;stable@vger.kernel.org&gt; # 3.17+
[ rjw : Subject ]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;

Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 79149001105f18bd2285ada109f9229ea24a7571 upstream.

It is reported that Samsung laptops that need to poll events are broken by
the following commit:
 Commit 3afcf2ece453e1a8c2c6de19cdf06da3772a1b08
 Subject: ACPI / EC: Add support to disallow QR_EC to be issued when SCI_EVT isn't set

The behaviors of the 2 vendor firmwares are conflict:
 1. Acer: OSPM shouldn't issue QR_EC unless SCI_EVT is set, firmware
         automatically sets SCI_EVT as long as there is event queued up.
 2. Samsung: OSPM should issue QR_EC whatever SCI_EVT is set, firmware
            returns 0 when there is no event queued up.

This patch is a quick fix to distinguish the behaviors to make Acer
behavior only effective for Acer EC firmware so that the breakages on
Samsung EC firmware can be avoided.

Fixes: 3afcf2ece453 (ACPI / EC: Add support to disallow QR_EC to be issued ...)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=44161
Reported-and-tested-by: Ortwin Glück &lt;odi@odi.ch&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.17+ &lt;stable@vger.kernel.org&gt; # 3.17+
[ rjw : Subject ]
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;

Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / EC: Add support to disallow QR_EC to be issued when SCI_EVT isn't set</title>
<updated>2014-11-05T09:03:18+00:00</updated>
<author>
<name>Lv Zheng</name>
<email>lv.zheng@intel.com</email>
</author>
<published>2014-08-21T06:41:13+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=6c0b6ba79db1b33efe2e5233fbefcd26d1a5a022'/>
<id>6c0b6ba79db1b33efe2e5233fbefcd26d1a5a022</id>
<content type='text'>
commit 3afcf2ece453e1a8c2c6de19cdf06da3772a1b08 upstream.

There is a platform refusing to respond QR_EC when SCI_EVT isn't set
(Acer Aspire V5-573G).

Currently, we rely on the behaviour that the EC firmware can respond
something (for example, 0x00 to indicate "no outstanding events") to
QR_EC even when SCI_EVT is not set, but the reporter has complained
about AC/battery pluging/unpluging and video brightness change delay
on that platform.

This is because the work item that has issued QR_EC has to wait until
timeout in this case, and the _Qxx method evaluation work item queued
after QR_EC one is delayed.

It sounds reasonable to fix this issue by:
 1. Implementing SCI_EVT sanity check before issuing QR_EC in the EC
    driver's main state machine.
 2. Moving QR_EC issuing out of the work queue used by _Qxx evaluation
    to a seperate IRQ handling thread.

This patch fixes this issue using solution 1.

By disallowing QR_EC to be issued when SCI_EVT isn't set, we are able to
handle such platform in the EC driver's main state machine. This patch
enhances the state machine in this way to survive with such malfunctioning
EC firmware.

Note that this patch can also fix CLEAR_ON_RESUME quirk which also relies
on the assumption that the platforms are able to respond even when SCI_EVT
isn't set.

Fixes: c0d653412fc8 ACPI / EC: Fix race condition in ec_transaction_completed()
Link: https://bugzilla.kernel.org/show_bug.cgi?id=82611
Reported-and-tested-by: Alexander Mezin &lt;mezin.alexander@gmail.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.16+ &lt;stable@vger.kernel.org&gt; # 3.16+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 3afcf2ece453e1a8c2c6de19cdf06da3772a1b08 upstream.

There is a platform refusing to respond QR_EC when SCI_EVT isn't set
(Acer Aspire V5-573G).

Currently, we rely on the behaviour that the EC firmware can respond
something (for example, 0x00 to indicate "no outstanding events") to
QR_EC even when SCI_EVT is not set, but the reporter has complained
about AC/battery pluging/unpluging and video brightness change delay
on that platform.

This is because the work item that has issued QR_EC has to wait until
timeout in this case, and the _Qxx method evaluation work item queued
after QR_EC one is delayed.

It sounds reasonable to fix this issue by:
 1. Implementing SCI_EVT sanity check before issuing QR_EC in the EC
    driver's main state machine.
 2. Moving QR_EC issuing out of the work queue used by _Qxx evaluation
    to a seperate IRQ handling thread.

This patch fixes this issue using solution 1.

By disallowing QR_EC to be issued when SCI_EVT isn't set, we are able to
handle such platform in the EC driver's main state machine. This patch
enhances the state machine in this way to survive with such malfunctioning
EC firmware.

Note that this patch can also fix CLEAR_ON_RESUME quirk which also relies
on the assumption that the platforms are able to respond even when SCI_EVT
isn't set.

Fixes: c0d653412fc8 ACPI / EC: Fix race condition in ec_transaction_completed()
Link: https://bugzilla.kernel.org/show_bug.cgi?id=82611
Reported-and-tested-by: Alexander Mezin &lt;mezin.alexander@gmail.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Cc: 3.16+ &lt;stable@vger.kernel.org&gt; # 3.16+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / RTC: Fix CMOS RTC opregion handler accesses to wrong addresses</title>
<updated>2014-10-13T13:41:04+00:00</updated>
<author>
<name>Lee, Chun-Yi</name>
<email>joeyli.kernel@gmail.com</email>
</author>
<published>2014-09-04T07:13:39+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=131d24d238b2072982068040d902a2b3a5f26711'/>
<id>131d24d238b2072982068040d902a2b3a5f26711</id>
<content type='text'>
commit 9389f46e9782ea5e56fbd7b2e59ba7c08f3ba86b upstream.

The value64 parameter is an u64 point that used to transfer the value
for write to CMOS, or used to return the value that's read from CMOS.

The value64 is an u64 point, so don't need get address again. It causes
acpi_cmos_rtc_space_handler always return 0 to reader and didn't write
expected value to CMOS.

Signed-off-by: Lee, Chun-Yi &lt;jlee@suse.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 9389f46e9782ea5e56fbd7b2e59ba7c08f3ba86b upstream.

The value64 parameter is an u64 point that used to transfer the value
for write to CMOS, or used to return the value that's read from CMOS.

The value64 is an u64 point, so don't need get address again. It causes
acpi_cmos_rtc_space_handler always return 0 to reader and didn't write
expected value to CMOS.

Signed-off-by: Lee, Chun-Yi &lt;jlee@suse.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ACPI / cpuidle: fix deadlock between cpuidle_lock and cpu_hotplug.lock</title>
<updated>2014-09-17T14:55:09+00:00</updated>
<author>
<name>Jiri Kosina</name>
<email>jkosina@suse.cz</email>
</author>
<published>2014-09-03T13:04:28+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=4cdd9a72256c461874df095fde4a6b96bd7f426d'/>
<id>4cdd9a72256c461874df095fde4a6b96bd7f426d</id>
<content type='text'>
commit 6726655dfdd2dc60c035c690d9f10cb69d7ea075 upstream.

There is a following AB-BA dependency between cpu_hotplug.lock and
cpuidle_lock:

1) cpu_hotplug.lock -&gt; cpuidle_lock
enable_nonboot_cpus()
 _cpu_up()
  cpu_hotplug_begin()
   LOCK(cpu_hotplug.lock)
 cpu_notify()
  ...
  acpi_processor_hotplug()
   cpuidle_pause_and_lock()
    LOCK(cpuidle_lock)

2) cpuidle_lock -&gt; cpu_hotplug.lock
acpi_os_execute_deferred() workqueue
 ...
 acpi_processor_cst_has_changed()
  cpuidle_pause_and_lock()
   LOCK(cpuidle_lock)
  get_online_cpus()
   LOCK(cpu_hotplug.lock)

Fix this by reversing the order acpi_processor_cst_has_changed() does
thigs -- let it first execute the protection against CPU hotplug by
calling get_online_cpus() and obtain the cpuidle lock only after that (and
perform the symmentric change when allowing CPUs hotplug again and
dropping cpuidle lock).

Spotted by lockdep.

Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 6726655dfdd2dc60c035c690d9f10cb69d7ea075 upstream.

There is a following AB-BA dependency between cpu_hotplug.lock and
cpuidle_lock:

1) cpu_hotplug.lock -&gt; cpuidle_lock
enable_nonboot_cpus()
 _cpu_up()
  cpu_hotplug_begin()
   LOCK(cpu_hotplug.lock)
 cpu_notify()
  ...
  acpi_processor_hotplug()
   cpuidle_pause_and_lock()
    LOCK(cpuidle_lock)

2) cpuidle_lock -&gt; cpu_hotplug.lock
acpi_os_execute_deferred() workqueue
 ...
 acpi_processor_cst_has_changed()
  cpuidle_pause_and_lock()
   LOCK(cpuidle_lock)
  get_online_cpus()
   LOCK(cpu_hotplug.lock)

Fix this by reversing the order acpi_processor_cst_has_changed() does
thigs -- let it first execute the protection against CPU hotplug by
calling get_online_cpus() and obtain the cpuidle lock only after that (and
perform the symmentric change when allowing CPUs hotplug again and
dropping cpuidle lock).

Spotted by lockdep.

Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>ACPICA: Utilities: Fix memory leak in acpi_ut_copy_iobject_to_iobject</title>
<updated>2014-09-17T14:55:09+00:00</updated>
<author>
<name>David E. Box</name>
<email>david.e.box@linux.intel.com</email>
</author>
<published>2014-07-08T02:05:52+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=7af5504c102a378376101dbd160246b10a814dd0'/>
<id>7af5504c102a378376101dbd160246b10a814dd0</id>
<content type='text'>
commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce upstream.

Adds return status check on copy routines to delete the allocated destination
object if either copy fails. Reported by Colin Ian King on bugs.acpica.org,
Bug 1087.
The last applicable commit:
 Commit: 3371c19c294a4cb3649aa4e84606be8a1d999e61
 Subject: ACPICA: Remove ACPI_GET_OBJECT_TYPE macro

Link: https://bugs.acpica.org/show_bug.cgi?id=1087
Reported-by: Colin Ian King &lt;colin.king@canonical.com&gt;
Signed-off-by: David E. Box &lt;david.e.box@linux.intel.com&gt;
Signed-off-by: Bob Moore &lt;robert.moore@intel.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce upstream.

Adds return status check on copy routines to delete the allocated destination
object if either copy fails. Reported by Colin Ian King on bugs.acpica.org,
Bug 1087.
The last applicable commit:
 Commit: 3371c19c294a4cb3649aa4e84606be8a1d999e61
 Subject: ACPICA: Remove ACPI_GET_OBJECT_TYPE macro

Link: https://bugs.acpica.org/show_bug.cgi?id=1087
Reported-by: Colin Ian King &lt;colin.king@canonical.com&gt;
Signed-off-by: David E. Box &lt;david.e.box@linux.intel.com&gt;
Signed-off-by: Bob Moore &lt;robert.moore@intel.com&gt;
Signed-off-by: Lv Zheng &lt;lv.zheng@intel.com&gt;
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Jiri Slaby &lt;jslaby@suse.cz&gt;

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