linux-kernel - [PATCH v3 0/9] ACPI / LPSS: fix system hangup on BYT/BSW/CHT

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Date:	Fri,  4 Dec 2015 23:49:16 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	linux-acpi@...r.kernel.org, Vinod Koul <vinod.koul@...el.com>,
	dmaengine@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v3 0/9] ACPI / LPSS: fix system hangup on BYT/BSW/CHT

Here is a v3 of the next generation (previous one is [1]) of the long standing
power issue fix regarding to LPSS on Intel Baytrail and Braswell SoCs, in
particularly ASuS T100TA. There are few bugs already opened on kernel.org's and
RedHat's bugzilla sites.

The series depends on the patch submitted earlier [2].

The patch 1 brings a new notification to handle the case when ->probe() of the
driver fails. It allows to avoid a potential problems. I've noticed couple of
drivers that are using that in assumption that ->probe() never fails.

The patches 2 & 4 are needed to fix an I2C issue which Jarkko is currently
investigating.

It seems the best way to push it through linux-pm tree. Thus, it would be good
to get ACKs from the rest of maintainers.

Rafael, it would be nice to have an immutable branch or tag for this sice I
have more patches coming for dw_dmac driver which are based on top of this
series.

The patches have been tested on ASuS T100TA, Intel Cherrytrail, and Intel
Braswell SoCs.

[1] http://www.spinics.net/lists/linux-acpi/msg53963.html
[2] http://www.spinics.net/lists/kernel/msg2119229.html

Changelog v3:
- patch 2 is split to pure revert with Fixes tag for stable and new change in
  patch 3
- add patch 4 to resolve an issue when I2C can't be probed and SDHCI leaves
  devices in D0
- address comments from Rafael
- quirk functions moved under CONFIG_PM

Andy Shevchenko (9):
  device core: add BUS_NOTIFY_DRIVER_NOT_BOUND notification
  Revert "ACPI / LPSS: allow to use specific PM domain during ->probe()"
  ACPI / LPSS: allow to use specific PM domain during ->probe()
  ACPI / LPSS: power on when probe() and otherwise when remove()
  ACPI / LPSS: do delay for all LPSS devices when D3->D0
  ACPI / LPSS: override power state for LPSS DMA device
  dmaengine: dw: platform: power on device on shutdown
  dmaengine: dw: return immediately from IRQ when DMA isn't in use
  Revert "dmaengine: dw: platform: provide platform data for Intel"

 arch/x86/Kconfig                |   3 +-
 arch/x86/include/asm/iosf_mbi.h |   2 +
 drivers/acpi/acpi_lpss.c        | 213 +++++++++++++++++++++++++++++++++++++---
 drivers/base/dd.c               |  10 +-
 drivers/dma/dw/core.c           |   9 +-
 drivers/dma/dw/platform.c       |  29 +++---
 include/linux/device.h          |   1 +
 7 files changed, 231 insertions(+), 36 deletions(-)

-- 
2.6.2

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