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

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Message-ID: <1838591.lmJz0NSQxf@vostro.rjw.lan>
Date:	Sat, 05 Dec 2015 00:07:58 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	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>
Subject: Re: [PATCH v3 0/9] ACPI / LPSS: fix system hangup on BYT/BSW/CHT

On Friday, December 04, 2015 11:49:16 PM Andy Shevchenko wrote:
> 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(-)

The series generally looks good to me, but patch [1/9] needs an ACK from Greg
and the dmaengine ones need ACKs from Vinod.

Thanks,
Rafael

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