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Date:   Mon, 5 Dec 2022 16:11:11 -0800
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Subject: Re: [PATCH 4.9 00/62] 4.9.335-rc1 review
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From:   Florian Fainelli <f.fainelli@gmail.com>
To:     Jon Hunter <jonathanh@nvidia.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Adrian Hunter <adrian.hunter@intel.com>,
        Kamal Dasu <kdasu.kdev@gmail.com>
Cc:     patches@lists.linux.dev, linux-kernel@vger.kernel.org,
        torvalds@linux-foundation.org, akpm@linux-foundation.org,
        linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org,
        lkft-triage@lists.linaro.org, pavel@denx.de,
        sudipm.mukherjee@gmail.com, srw@sladewatkins.net, rwarsow@gmx.de
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On 12/5/22 14:48, Florian Fainelli wrote:
> On 12/5/22 14:28, Jon Hunter wrote:
>> Hi Greg,
>>
>> On 05/12/2022 19:08, Greg Kroah-Hartman wrote:
>>> This is the start of the stable review cycle for the 4.9.335 release.
>>> There are 62 patches in this series, all will be posted as a response
>>> to this one.  If anyone has any issues with these being applied, please
>>> let me know.
>>>
>>> Responses should be made by Wed, 07 Dec 2022 19:07:46 +0000.
>>> Anything received after that time might be too late.
>>>
>>> The whole patch series can be found in one patch at:
>>>     https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.9.335-rc1.gz
>>> or in the git tree and branch at:
>>>     git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y
>>> and the diffstat can be found below.
>>>
>>> thanks,
>>>
>>> greg k-h
>>>
>>> -------------
>>> Pseudo-Shortlog of commits:
>>>
>>> Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>>>      Linux 4.9.335-rc1
>>>
>>> Adrian Hunter <adrian.hunter@intel.com>
>>>      mmc: sdhci: Fix voltage switch delay
>>
>>
>> I am seeing a boot regression on a couple boards and bisect is 
>> pointing to the above commit.
> 
> Same thing here, getting a hard lock for our devices with the SDHCI 
> controller enabled, sometimes we are lucky to see the following:
> 
> [    4.790367] mmc0: SDHCI controller on 84b0000.sdhci [84b0000.sdhci] 
> using ADMA 64-bit
> [   25.802351] INFO: rcu_sched detected stalls on CPUs/tasks:
> [   25.807871]  1-...: (1 GPs behind) idle=561/140000000000000/0 
> softirq=728/728 fqs=5252
> [   25.815892]  (detected by 0, t=21017 jiffies, g=61, c=60, q=55)
> [   25.821834] Task dump for CPU 1:
> [   25.825069] kworker/1:1     R  running task        0   509      2 
> 0x00000002
> [   25.832164] Workqueue: events_freezable mmc_rescan
> [   25.836974] Backtrace:
> [   25.839440] [<ce32fea4>] (0xce32fea4) from [<ce32fed4>] (0xce32fed4)
> [   25.845803] Backtrace aborted due to bad frame pointer <cd2f0a54>
> 
> Also confirmed that reverting that change ("mmc: sdhci: Fix voltage 
> switch delay") allows devices to boot properly.
> 
> Had not a chance to test the change when submitted for mainline despite 
> being copied, sorry about that.
> 
> Since that specific commit is also included in the other stable trees 
> (5.4, 5.10, 5.15 and 6.0) I will let you know whether the same issue is 
> present in those trees shortly thereafter.

This only appears to impact 4.9, Adrian is there a missing functional 
dependency for "mmc: sdhci: Fix voltage switch delay" to work correctly 
on the 4.9 kernel?
-- 
Florian