linux-stable.git/drivers/base/core.c, branch v4.12.2

Add "shutdown" to "struct class".

2017-07-12T14:55:24+00:00

commit f77af15165847406b15d8f70c382c4cb15846b2a upstream.

The TPM class has some common shutdown code that must be executed for
all drivers. This adds some needed functionality for that.

Signed-off-by: Josh Zimmerman 
Acked-by: Greg Kroah-Hartman 
Fixes: 74d6b3ceaa17 ("tpm: fix suspend/resume paths for TPM 2.0")
Reviewed-by: Jarkko Sakkinen 
Tested-by: Jarkko Sakkinen 
Signed-off-by: Jarkko Sakkinen 
Signed-off-by: James Morris 
Signed-off-by: Greg Kroah-Hartman

driver core: don't initialize 'parent' in device_add()

2017-04-08T16:27:39+00:00

'parent' is always overwritten before getting used and there is no need
to initialize it with NULL.

Signed-off-by: Viresh Kumar 
Signed-off-by: Greg Kroah-Hartman

drivers core: remove assert_held_device_hotplug()

2017-03-16T23:56:19+00:00

The last caller of assert_held_device_hotplug() is gone, so remove it again.

Link: http://lkml.kernel.org/r/20170314125226.16779-3-heiko.carstens@de.ibm.com
Signed-off-by: Heiko Carstens 
Acked-by: Dan Williams 
Cc: Michal Hocko 
Cc: "Rafael J. Wysocki" 
Cc: Vladimir Davydov 
Cc: Ben Hutchings 
Cc: Gerald Schaefer 
Cc: Martin Schwidefsky 
Cc: Sebastian Ott 
Cc: Greg Kroah-Hartman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched/headers: Prepare to move signal wakeup & sigpending methods from into

2017-03-02T07:42:32+00:00

Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

mm: validate device_hotplug is held for memory hotplug

2017-02-25T01:46:53+00:00

mem_hotplug_begin() assumes that it can set mem_hotplug.active_writer
and run the hotplug process without racing another thread.  Validate
this assumption with a lockdep assertion.

Link: http://lkml.kernel.org/r/148693886229.16345.1770484669403334689.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams 
Reported-by: Ben Hutchings 
Cc: Michal Hocko 
Cc: Toshi Kani 
Cc: Vlastimil Babka 
Cc: Logan Gunthorpe 
Cc: Greg Kroah-Hartman 
Cc: Masayoshi Mizuma 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Revert "driver core: Add deferred_probe attribute to devices in sysfs"

2017-01-14T13:09:03+00:00

This reverts commit 6751667a29d6fd64afb9ce30567ad616b68ed789.

Rob Herring objected to it, and a replacement for it will be added using
debugfs in the future.

Cc: Ben Hutchings 
Reported-by: Rob Herring 
Signed-off-by: Greg Kroah-Hartman

driver core: Silence device links sphinx warning

2016-12-05T14:02:20+00:00

Silence this warning emitted by sphinx:
include/linux/device.h:938: warning: No description found for parameter 'links'

While at it, fix typos in comments of device links code.

Cc: Rafael J. Wysocki 
Cc: Jonathan Corbet 
Cc: Silvio Fricke 
Signed-off-by: Lukas Wunner 
Reviewed-by: Mauro Carvalho Chehab 
Signed-off-by: Greg Kroah-Hartman

driver core: Add deferred_probe attribute to devices in sysfs

2016-11-10T16:22:23+00:00

It is sometimes useful to know that a device is on the deferred probe
list rather than, say, not having a driver available.  Expose this
information to user-space.

Signed-off-by: Ben Hutchings 
Signed-off-by: Greg Kroah-Hartman

PM / runtime: Optimize the use of device links

2016-10-31T17:42:51+00:00

If the device has no links to suppliers that should be used for
runtime PM (links with DEVICE_LINK_PM_RUNTIME set), there is no
reason to walk the list of suppliers for that device during
runtime suspend and resume.

Add a simple mechanism to detect that case and possibly avoid the
extra unnecessary overhead.

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

PM / runtime: Use device links

2016-10-31T17:42:51+00:00

Modify the runtime PM framework to use device links to ensure that
supplier devices will not be suspended if any of their consumer
devices are active.

The idea is to reference count suppliers on the consumer's resume
and drop references to them on its suspend.  The information on
whether or not the supplier has been reference counted by the
consumer's (runtime) resume is stored in a new field (rpm_active)
in the link object for each link.

It may be necessary to clean up those references when the
supplier is unbinding and that's why the links whose status is
DEVICE_LINK_SUPPLIER_UNBIND are skipped by the runtime suspend
and resume code.

The above means that if the consumer device is probed in the
runtime-active state, the supplier has to be resumed and reference
counted by device_link_add() so the code works as expected on its
(runtime) suspend.  There is a new flag, DEVICE_LINK_RPM_ACTIVE,
to tell device_link_add() about that (in which case the caller
is responsible for making sure that the consumer really will
be runtime-active when runtime PM is enabled for it).

The other new link flag, DEVICE_LINK_PM_RUNTIME, tells the core
whether or not the link should be used for runtime PM at all.

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