linux-stable.git/drivers/acpi, branch v4.4.130

ACPI / video: Add quirk to force acpi-video backlight on Samsung 670Z5E

2018-04-24T07:32:06+00:00

commit bbf038618a24d72e2efc19146ef421bb1e1eda1a upstream.

Just like many other Samsung models, the 670Z5E needs to use the acpi-video
backlight interface rather then the native one for backlight control to
work, add a quirk for this.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1557060
Cc: All applicable 
Signed-off-by: Hans de Goede 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Disassembler: Abort on an invalid/unknown AML opcode

2018-04-13T17:50:21+00:00

[ Upstream commit 6f0527b77d9e0129dd8e50945b0d610ed943d6b2 ]

ACPICA commit ed0389cb11a61e63c568ac1f67948fc6a7bd1aeb

An invalid opcode indicates something seriously wrong with the
input AML file. The AML parser is immediately confused and lost,
causing the resulting parse tree to be ill-formed. The actual
disassembly can then cause numerous unrelated errors and faults.

This change aborts the disassembly upon discovery of such an
opcode during the AML parse phase.

Link: https://github.com/acpica/acpica/commit/ed0389cb
Signed-off-by: Bob Moore 
Signed-off-by: Lv Zheng 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ACPICA: Events: Add runtime stub support for event APIs

2018-04-13T17:50:21+00:00

[ Upstream commit 861ba6351c520328e94a78c923b415faa9116287 ]

ACPICA commit 99bc3beca92c6574ea1d69de42e54f872e6373ce

It is reported that on Linux, RTC driver complains wrong errors on
hardware reduced platform:
  [    4.085420] ACPI Warning: Could not enable fixed event - real_time_clock (4) (20160422/evxface-654)

This patch fixes this by correctly adding runtime reduced hardware check.
Reported by Chandan Tagore, fixed by Lv Zheng.

Link: https://github.com/acpica/acpica/commit/99bc3bec
Tested-by: Chandan Tagore 
Signed-off-by: Lv Zheng 
Signed-off-by: Bob Moore 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ACPI, PCI, irq: remove redundant check for null string pointer

2018-04-08T09:51:56+00:00

commit 45288978859119c019eff93f0cb838a0de100bcc upstream.

source is decleared as a 4 byte char array in struct acpi_pci_routing_table
so !prt->source is a redundant null string pointer check. Detected with
smatch:

drivers/acpi/pci_irq.c:134 do_prt_fixups() warn: this array is probably
  non-NULL. 'prt->source'

Signed-off-by: Colin Ian King 
Signed-off-by: Rafael J. Wysocki 
Cc: Nathan Chancellor 
Signed-off-by: Greg Kroah-Hartman

acpi, numa: fix pxm to online numa node associations

2018-03-28T16:40:15+00:00

commit dc9e0a9347e932e3fd3cd03e7ff241022ed6ea8a upstream.

Commit 99759869faf1 "acpi: Add acpi_map_pxm_to_online_node()" added
support for mapping a given proximity to its nearest, by SLIT distance,
online node. However, it sometimes returns unexpected results due to the
fact that it switches from comparing the PXM node to the last node that
was closer than the current max.

    for_each_online_node(n) {
            dist = node_distance(node, n);
            if (dist < min_dist) {
                    min_dist = dist;
                    node = n;	<---- from this point we're using the
				      wrong node for node_distance()


Fixes: 99759869faf1 ("acpi: Add acpi_map_pxm_to_online_node()")
Cc: 
Reviewed-by: Toshi Kani 
Acked-by: Rafael J. Wysocki >
Signed-off-by: Dan Williams 
Signed-off-by: Greg Kroah-Hartman

ACPI / PMIC: xpower: Fix power_table addresses

2018-03-24T09:58:45+00:00

[ Upstream commit 2bde7c32b1db162692f05c6be066b5bcd3d9fdbe ]

The power table addresses should be contiguous, but there was a hole
where 0x34 was missing. On most devices this is not a problem as
addresses above 0x34 are used for the BUC# convertors which are not
used in the DSDTs I've access to but after the BUC# convertors
there is a field named GPI1 in the DSTDs, which does get used in some
cases and ended up turning BUC6 on and off due to the wrong addresses,
resulting in turning the entire device off (or causing it to reboot).

Removing the hole in the addresses fixes this, fixing one of my
Bay Trail tablets turning off while booting the mainline kernel.

While at it add comments with the field names used in the DSDTs to
make it easier to compare the register and bits used at each address
with the datasheet.

Signed-off-by: Hans de Goede 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ACPI/processor: Replace racy task affinity logic

2018-03-24T09:58:40+00:00

[ Upstream commit 8153f9ac43897f9f4786b30badc134fcc1a4fb11 ]

acpi_processor_get_throttling() requires to invoke the getter function on
the target CPU. This is achieved by temporarily setting the affinity of the
calling user space thread to the requested CPU and reset it to the original
affinity afterwards.

That's racy vs. CPU hotplug and concurrent affinity settings for that
thread resulting in code executing on the wrong CPU and overwriting the
new affinity setting.

acpi_processor_get_throttling() is invoked in two ways:

1) The CPU online callback, which is already running on the target CPU and
   obviously protected against hotplug and not affected by affinity
   settings.

2) The ACPI driver probe function, which is not protected against hotplug
   during modprobe.

Switch it over to work_on_cpu() and protect the probe function against CPU
hotplug.

Signed-off-by: Thomas Gleixner 
Cc: Fenghua Yu 
Cc: Tony Luck 
Cc: Herbert Xu 
Cc: "Rafael J. Wysocki" 
Cc: Peter Zijlstra 
Cc: Benjamin Herrenschmidt 
Cc: Sebastian Siewior 
Cc: Lai Jiangshan 
Cc: linux-acpi@vger.kernel.org
Cc: Viresh Kumar 
Cc: Michael Ellerman 
Cc: Tejun Heo 
Cc: "David S. Miller" 
Cc: Len Brown 
Link: http://lkml.kernel.org/r/20170412201042.785920903@linutronix.de
Signed-off-by: Thomas Gleixner 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ACPI/processor: Fix error handling in __acpi_processor_start()

2018-03-24T09:58:40+00:00

[ Upstream commit a5cbdf693a60d5b86d4d21dfedd90f17754eb273 ]

When acpi_install_notify_handler() fails the cooling device stays
registered and the sysfs files created via acpi_pss_perf_init() are
leaked and the function returns success.

Undo acpi_pss_perf_init() and return a proper error code.

Signed-off-by: Thomas Gleixner 
Cc: Fenghua Yu 
Cc: Tony Luck 
Cc: Herbert Xu 
Cc: "Rafael J. Wysocki" 
Cc: Peter Zijlstra 
Cc: Benjamin Herrenschmidt 
Cc: Sebastian Siewior 
Cc: Lai Jiangshan 
Cc: linux-acpi@vger.kernel.org
Cc: Viresh Kumar 
Cc: Michael Ellerman 
Cc: Tejun Heo 
Cc: "David S. Miller" 
Cc: Len Brown 
Link: http://lkml.kernel.org/r/20170412201042.695499645@linutronix.de
Signed-off-by: Thomas Gleixner 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

ACPI: sbshc: remove raw pointer from printk() message

2018-02-16T19:09:47+00:00

commit 43cdd1b716b26f6af16da4e145b6578f98798bf6 upstream.

There's no need to be printing a raw kernel pointer to the kernel log at
every boot.  So just remove it, and change the whole message to use the
correct dev_info() call at the same time.

Reported-by: Wang Qize 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

ACPI / bus: Leave modalias empty for devices which are not present

2018-02-03T16:04:27+00:00

[ Upstream commit 10809bb976648ac58194a629e3d7af99e7400297 ]

Most Bay and Cherry Trail devices use a generic DSDT with all possible
peripheral devices present in the DSDT, with their _STA returning 0x00 or
0x0f based on AML variables which describe what is actually present on
the board.

Since ACPI device objects with a 0x00 status (not present) still get an
entry under /sys/bus/acpi/devices, and those entry had an acpi:PNPID
modalias, userspace would end up loading modules for non present hardware.

This commit fixes this by leaving the modalias empty for non present
devices. This results in 10 modules less being loaded with a generic
distro kernel config on my Cherry Trail test-device (a GPD pocket).

Signed-off-by: Hans de Goede 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman