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Rafael J. Wysocki 147a7d9d25 ACPI / PM: Do not reconfigure GPEs for suspend-to-idle 
It is reported that commit 235d81a630 (ACPI / PM: Clean up device
wakeup enable/disable code) broke wakeup from suspend-to-idle on
some platforms.  That is due to the acpi_enable_all_wakeup_gpes() in
acpi_s2idle_prepare() which needs acpi_enable_wakeup_devices() to be
called before it as the latter sets up the GPE masks used by the
former and commit 235d81a630 removed acpi_enable_wakeup_devices()
invocation from the suspend-to-idle path.

However, acpi_enable_wakeup_devices() does more than just setting
the GPE masks and the remaining part of it is not necessary for
suspend-to-idle.  Moreover, non-wakeup GPEs are disabled on suspend-
to-idle entry to avoid spurious wakeups, but that should not be
strictly necessary any more after commit 33e4f80ee6 (ACPI / PM:
Ignore spurious SCI wakeups from suspend-to-idle) which prevents
spurious GPE wakeups from resuming the system.  The only consequence
of leaving non-wakeup GPEs enabled may be more interrupt-related
activity while suspended, which is not ideal (more energy is used
if that happens), but it is not critical too.

For this reason, drop the GPE reconfiguration from the suspend-to-idle
path entirely.

This change also allows Dells XPS13 9360 blacklisted by commit
71630b7a83 (ACPI / PM: Blacklist Low Power S0 Idle _DSM for Dell
XPS13 9360) to use the power button for waking up from suspend-
to-idle and it helps at least one other older Dell system (the
wakeup button GPE on that one is not listed in _PRW for any
devices, so it is not regarded as a wakeup one and gets disabled
on suspend-to-idle entry today).

Fixes: 235d81a630 (ACPI / PM: Clean up device wakeup enable/disable code)
Reported-by: Du Wenkai <wenkai.du@intel.com>
Tested-by: Du Wenkai <wenkai.du@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-02-21 23:53:34 +01:00
arch Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-18 12:56:41 -08:00
block blk: optimization for classic polling 2018-02-13 09:12:04 -07:00
certs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-02-12 08:57:21 -08:00
Documentation ACPI updates for v4.16-rc2 2018-02-15 14:50:32 -08:00
drivers ACPI / PM: Do not reconfigure GPEs for suspend-to-idle 2018-02-21 23:53:34 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs for-4.16-rc1-tag 2018-02-16 09:26:18 -08:00
include Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-18 11:54:22 -08:00
init membarrier: Provide core serializing command, *_SYNC_CORE 2018-02-05 21:35:03 +01:00
ipc vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-18 12:38:40 -08:00
lib dma-direct: comment the dma_direct_free calling convention 2018-02-12 15:59:07 +00:00
LICENSES LICENSES: Add MPL-1.1 license 2018-01-06 10:59:44 -07:00
mm mm: hide a #warning for COMPILE_TEST 2018-02-16 09:41:36 -08:00
net virtio: bugfixes 2018-02-15 14:29:27 -08:00
samples sample/bpf: fix erspan metadata 2018-02-06 11:32:49 -05:00
scripts Kbuild updates for v4.16 (2nd) 2018-02-09 19:32:41 -08:00
security vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
sound ALSA: hda/realtek: PCI quirk for Fujitsu U7x7 2018-02-14 12:02:26 +01:00
tools perf/core improvements and fixes: 2018-02-16 09:10:09 +01:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore scripts/package: snap-pkg target 2017-12-13 00:00:18 +09:00
.mailmap mailmap: update Mark Yao's email address 2018-01-04 16:45:09 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-14 17:02:15 -08:00
Makefile Linux 4.16-rc2 2018-02-18 17:29:42 -08:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.