From: Sasha Levin <sashal@kernel.org>
To: Qais Yousef <qais.yousef@arm.com>
Cc: Eugeniu Rosca <erosca@de.adit-jv.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, linux-pm@vger.kernel.org,
Tony Prisk <linux@prisktech.co.nz>,
Mathias Nyman <mathias.nyman@intel.com>,
Oliver Neukum <oneukum@suse.de>,
linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org,
Andrew Gabbasov <andrew_gabbasov@mentor.com>,
Dirk Behme <dirk.behme@de.bosch.com>,
Eugeniu Rosca <roscaeugeniu@gmail.com>
Subject: Re: [PATCH 4.14 105/136] usb/ehci-platform: Set PM runtime as active on resume
Date: Fri, 17 Jul 2020 13:16:18 -0400 [thread overview]
Message-ID: <20200717171618.GQ2722994@sasha-vm> (raw)
In-Reply-To: <20200717161639.37ptgbolborimcvs@e107158-lin.cambridge.arm.com>
On Fri, Jul 17, 2020 at 05:17:23PM +0100, Qais Yousef wrote:
>Hi Eugeniu
>
>On 07/09/20 09:00, Eugeniu Rosca wrote:
>> Hello everyone,
>>
>> Cc: linux-renesas-soc
>> Cc: linux-pm
>
>[...]
>
>> After integrating v4.14.186 commit 5410d158ca2a50 ("usb/ehci-platform:
>> Set PM runtime as active on resume") into downstream v4.14.x, we started
>> to consistently experience below panic [1] on every second s2ram of
>> R-Car H3 Salvator-X Renesas reference board.
>>
>> After some investigations, we concluded the following:
>> - the issue does not exist in vanilla v5.8-rc4+
>> - [bisecting shows that] the panic on v4.14.186 is caused by the lack
>> of v5.6-rc1 commit 987351e1ea7772 ("phy: core: Add consumer device
>> link support"). Getting evidence for that is easy. Reverting
>> 987351e1ea7772 in vanilla leads to a similar backtrace [2].
>>
>> Questions:
>> - Backporting 987351e1ea7772 ("phy: core: Add consumer device
>> link support") to v4.14.187 looks challenging enough, so probably not
>> worth it. Anybody to contradict this?
>> - Assuming no plans to backport the missing mainline commit to v4.14.x,
>> should the following three v4.14.186 commits be reverted on v4.14.x?
>> * baef809ea497a4 ("usb/ohci-platform: Fix a warning when hibernating")
>> * 9f33eff4958885 ("usb/xhci-plat: Set PM runtime as active on resume")
>> * 5410d158ca2a50 ("usb/ehci-platform: Set PM runtime as active on resume")
>
>Thanks for investigating this.
>
>Alan, Greg, do you have any ideas?
I've reverted these 3 commits from 5.4 and earlier, thank you for
investigating this issue.
--
Thanks,
Sasha
prev parent reply other threads:[~2020-07-17 17:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200623195303.601828702@linuxfoundation.org>
2020-06-23 19:58 ` [PATCH 4.14 061/136] usb/ohci-platform: Fix a warning when hibernating Greg Kroah-Hartman
2020-06-23 19:59 ` [PATCH 4.14 104/136] usb/xhci-plat: Set PM runtime as active on resume Greg Kroah-Hartman
2020-06-23 19:59 ` [PATCH 4.14 105/136] usb/ehci-platform: " Greg Kroah-Hartman
2020-07-09 7:00 ` Eugeniu Rosca
2020-07-17 16:17 ` Qais Yousef
2020-07-17 17:16 ` Sasha Levin [this message]
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