linux-kernel - Re: [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress

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Message-ID: <1e7dcb2c31beb3ea884879235fb70270fb483731.camel@mediatek.com>
Date: Tue, 5 Aug 2025 07:39:28 +0000
From: Peter Wang (王信友) <peter.wang@...iatek.com>
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Subject: Re: [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host
 asyn scan in progress

On Tue, 2025-08-05 at 14:03 +0800, Ziqi Chen wrote:
> 
> Hi Peter,
> 
> I saw you raised a ACK change to revert this whole change on branch
> Android16-6.12. Without this change, you will meet stuck issue during
> stability reboot test due to request queue quiesce and unquiesce
> mismatch.
> 
> This lockdep print just a warning, and as per my analysis before,
> This
> is a misjudgment. But stuck/crash issue is a real issue which has
> real
> instance.
> 
> Can you abort your reverting change?
> 
> 
> BRs,
> Ziqi

Hi Ziqi,

The lockdep warning remains a problem that impacts the 
functionality of lockdep. Furthermore, the lockdep issue
is consistently reproducible, unlike the stuck/crash issue,
which is rare and only occurred after the clock scale code 
had been in use for several years.

Therefore, I recommend ACK reverting first and then merging 
the fixed patch together.

Thanks.
Peter