linux-kernel - Re: [PATCH v19 3/3] scsi: ufs: Prepare HPB read for cached sub-region

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Message-ID: <19a3cf32c556455f43f9c0f61a408eda65f6d7ec.camel@gmail.com>
Date:   Sun, 07 Feb 2021 11:44:56 +0100
From:   Bean Huo <huobean@...il.com>
To:     Can Guo <cang@...eaurora.org>
Cc:     Avri Altman <Avri.Altman@....com>, daejun7.park@...sung.com,
        Greg KH <gregkh@...uxfoundation.org>, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, asutoshd@...eaurora.org,
        stanley.chu@...iatek.com, bvanassche@....org,
        ALIM AKHTAR <alim.akhtar@...sung.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        yongmyung lee <ymhungry.lee@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        BoRam Shin <boram.shin@...sung.com>,
        SEUNGUK SHIN <seunguk.shin@...sung.com>
Subject: Re: [PATCH v19 3/3] scsi: ufs: Prepare HPB read for cached
 sub-region

On Sun, 2021-02-07 at 15:36 +0800, Can Guo wrote:
> > 
> > Thanks, I tested Daejun's patchset before, it is also ok (I don't
> > know
> > which version patchset). maybe we can keep current implementation
> > as
> > default, then if there is conflict, and submit the quirk.
> > 
> 
> Yeah, you've tested it, are you sure that Micron's UFS devices are OK
> with this specific code line?
> 
> Micron UFS FW team has confirmed that Micron's HPB entries read out
> by
> "HPB Buffer Read" cmd are in big-endian byte ordering.

Aha, I think you didn't check with right person :), ping me, let me
tell you this confusing story. and see my HPB patch, I didn't the same
with here:

https://patchwork.kernel.org/project/linux-scsi/patch/20200504142032.16619-6-beanhuo@micron.com/

Bean