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From: Robin Murphy <robin.murphy@arm.com>
To: Vicente Bergas <vicencb@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	Heiko Stuebner <heiko@sntech.de>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Frederick Lawler" <fred@fredlawl.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-rockchip@lists.infradead.org,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	"Andrew Murray" <andrew.murray@arm.com>,
	"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
	"Mika Westerberg" <mika.westerberg@linux.intel.com>,
	"Stefan Mätje" <stefan.maetje@esd.eu>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [REGRESSION] PCI v5.5-rc1 breaks google kevin
Date: Thu, 12 Dec 2019 00:12:56 +0000	[thread overview]
Message-ID: <166f0016-7061-be5c-660d-0499f74e8697@arm.com> (raw)
In-Reply-To: <58ce5534-64bd-4b4b-bd60-ed4e0c71b20f@gmail.com>

Hi Vicente,

On 2019-12-11 11:38 pm, Vicente Bergas wrote:
> Hi,
> since v5.5-rc1 the google kevin chromebook does not boot.
> Git bisect reports 5e0c21c75e8c PCI/ASPM: Remove pcie_aspm_enabled() 
> unnecessary locking
> as the first bad commit.
> 
> In order to revert it from v5.5-rc1 i had to also revert some dependencies:
> 5e0c21c75e8c08375a69710527e4a921b897cb7e
> aff5d0552da4055da3faa27ee4252e48bb1f5821
> 35efea32b26f9aacc99bf07e0d2cdfba2028b099
> 687aaf386aeb551130f31705ce40d1341047a936
> 72ea91afbfb08619696ccde610ee4d0d29cf4a1d
> 87e90283c94c76ee11d379ab5a0973382bbd0baf
> After reverting all of this, still no luck.
> So, either the results of git bisect are not to be trusted, or
> there are more bad commits.
> 
> By "does not boot" i mean that the display fails to start and
> the display is the only output device, so debugging is quite difficult.

Assuming it's a manifestation of the same PCI breakage that Enric and 
Lorenzo figured out, there's a proposed fix here: 
https://lkml.org/lkml/2019/12/11/199

Robin.

> v5.5-rc1 as is (reverting no commits at all) works fine when disabling PCI:
> # CONFIG_PCI is not set
> 
> Regards,
>   Vicente.
> 
> 
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

  reply	other threads:[~2019-12-12  0:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-11 23:38 [REGRESSION] PCI v5.5-rc1 breaks google kevin Vicente Bergas
2019-12-12  0:12 ` Robin Murphy [this message]
2019-12-12  0:52   ` Andrew Murray
2019-12-12 14:16     ` Enric Balletbo Serra
2019-12-12 18:40       ` Vicente Bergas
2019-12-12 20:39         ` Andrew Murray
2019-12-12 20:48           ` Vicente Bergas

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