linux-stable.git/drivers/hwmon, branch v4.4.201

hwmon: (acpi_power_meter) Change log level for 'unsafe software power cap'

2019-10-05T10:27:49+00:00

[ Upstream commit 6e4d91aa071810deac2cd052161aefb376ecf04e ]

At boot time, the acpi_power_meter driver logs the following error level
message: "Ignoring unsafe software power cap". Having read about it from
a few sources, it seems that the error message can be quite misleading.

While the message can imply that Linux is ignoring the fact that the
system is operating in potentially dangerous conditions, the truth is
the driver found an ACPI_PMC object that supports software power
capping. The driver simply decides not to use it, perhaps because it
doesn't support the object.

The best solution is probably changing the log level from error to warning.
All sources I have found, regarding the error, have downplayed its
significance. There is not much of a reason for it to be on error level,
while causing potential confusions or misinterpretations.

Signed-off-by: Wang Shenran 
Link: https://lore.kernel.org/r/20190724080110.6952-1-shenran268@gmail.com
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (nct7802) Fix wrong detection of in4 presence

2019-08-25T08:52:52+00:00

commit 38ada2f406a9b81fb1249c5c9227fa657e7d5671 upstream.

The code to detect if in4 is present is wrong; if in4 is not present,
the in4_input sysfs attribute is still present.

In detail:

- Ihen RTD3_MD=11 (VSEN3 present), everything is as expected (no bug).
- If we have RTD3_MD!=11 (no VSEN3), we unexpectedly have a in4_input
  file under /sys and the "sensors" command displays in4_input.
  But as expected, we have no in4_min, in4_max, in4_alarm, in4_beep.

Fix is_visible function to detect and report in4_input visibility
as expected.

Reported-by: Gilles Buloz 
Cc: Gilles Buloz 
Cc: stable@vger.kernel.org
Fixes: 3434f37835804 ("hwmon: Driver for Nuvoton NCT7802Y")
Signed-off-by: Guenter Roeck 
Signed-off-by: Greg Kroah-Hartman

hwmon: (nct6775) Fix register address and added missed tolerance for nct6106

2019-08-25T08:52:47+00:00

[ Upstream commit f3d43e2e45fd9d44ba52d20debd12cd4ee9c89bf ]

Fixed address of third NCT6106_REG_WEIGHT_DUTY_STEP, and
added missed NCT6106_REG_TOLERANCE_H.

Fixes: 6c009501ff200 ("hwmon: (nct6775) Add support for NCT6102D/6106D")
Signed-off-by: Bjoern Gerhart 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (pmbus/core) Treat parameters as paged if on multiple pages

2019-07-10T07:56:33+00:00

[ Upstream commit 4a60570dce658e3f8885bbcf852430b99f65aca5 ]

Some chips have attributes which exist on more than one page but the
attribute is not presently marked as paged. This causes the attributes
to be generated with the same label, which makes it impossible for
userspace to tell them apart.

Marking all such attributes as paged would result in the page suffix
being added regardless of whether they were present on more than one
page or not, which might break existing setups. Therefore, we add a
second check which treats the attribute as paged, even if not marked as
such, if it is present on multiple pages.

Fixes: b4ce237b7f7d ("hwmon: (pmbus) Introduce infrastructure to detect sensors and limit registers")
Signed-off-by: Robert Hancock 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (f71805f) Use request_muxed_region for Super-IO accesses

2019-06-11T10:24:00+00:00

[ Upstream commit 73e6ff71a7ea924fb7121d576a2d41e3be3fc6b5 ]

Super-IO accesses may fail on a system with no or unmapped LPC bus.

Unable to handle kernel paging request at virtual address ffffffbffee0002e
pgd = ffffffc1d68d4000
[ffffffbffee0002e] *pgd=0000000000000000, *pud=0000000000000000
Internal error: Oops: 94000046 [#1] PREEMPT SMP
Modules linked in: f71805f(+) hwmon
CPU: 3 PID: 1659 Comm: insmod Not tainted 4.5.0+ #88
Hardware name: linux,dummy-virt (DT)
task: ffffffc1f6665400 ti: ffffffc1d6418000 task.ti: ffffffc1d6418000
PC is at f71805f_find+0x6c/0x358 [f71805f]

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple
drivers is synchronized.

Fixes: e53004e20a58e ("hwmon: New f71805f driver")
Reported-by: Kefeng Wang 
Reported-by: John Garry 
Cc: John Garry 
Acked-by: John Garry 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (pc87427) Use request_muxed_region for Super-IO accesses

2019-06-11T10:23:59+00:00

[ Upstream commit 755a9b0f8aaa5639ba5671ca50080852babb89ce ]

Super-IO accesses may fail on a system with no or unmapped LPC bus.

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple drivers
is synchronized.

Fixes: ba224e2c4f0a7 ("hwmon: New PC87427 hardware monitoring driver")
Reported-by: Kefeng Wang 
Reported-by: John Garry 
Cc: John Garry 
Acked-by: John Garry 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (smsc47b397) Use request_muxed_region for Super-IO accesses

2019-06-11T10:23:59+00:00

[ Upstream commit 8c0826756744c0ac1df600a5e4cca1a341b13101 ]

Super-IO accesses may fail on a system with no or unmapped LPC bus.

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple drivers
is synchronized.

Fixes: 8d5d45fb1468 ("I2C: Move hwmon drivers (2/3)")
Reported-by: Kefeng Wang 
Reported-by: John Garry 
Cc: John Garry 
Acked-by: John Garry 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (smsc47m1) Use request_muxed_region for Super-IO accesses

2019-06-11T10:23:59+00:00

[ Upstream commit d6410408ad2a798c4cc685252c1baa713be0ad69 ]

Super-IO accesses may fail on a system with no or unmapped LPC bus.

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple drivers
is synchronized.

Fixes: 8d5d45fb1468 ("I2C: Move hwmon drivers (2/3)")
Reported-by: Kefeng Wang 
Reported-by: John Garry 
Cc: John Garry 
Acked-by: John Garry 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (vt1211) Use request_muxed_region for Super-IO accesses

2019-06-11T10:23:59+00:00

[ Upstream commit 14b97ba5c20056102b3dd22696bf17b057e60976 ]

Super-IO accesses may fail on a system with no or unmapped LPC bus.

Also, other drivers may attempt to access the LPC bus at the same time,
resulting in undefined behavior.

Use request_muxed_region() to ensure that IO access on the requested
address space is supported, and to ensure that access by multiple drivers
is synchronized.

Fixes: 2219cd81a6cd ("hwmon/vt1211: Add probing of alternate config index port")
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin

hwmon: (lm80) Fix missing unlock on error in set_fan_div()

2019-02-23T08:05:13+00:00

[ Upstream commit 07bd14ccc3049f9c0147a91a4227a571f981601a ]

Add the missing unlock before return from function set_fan_div()
in the error handling case.

Fixes: c9c63915519b ("hwmon: (lm80) fix a missing check of the status of SMBus read")
Signed-off-by: Wei Yongjun 
Signed-off-by: Guenter Roeck 
Signed-off-by: Sasha Levin