linux-kernel - Re: [PATCH v1 1/3] scsi: ufs: add write booster feature support

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Message-ID: <CAP2JTQKu77risdNFBy5zwHoRU3qZw2dMi5Hxfi5Tyf6b9GB3XQ@mail.gmail.com>
Date:   Tue, 23 Jun 2020 15:51:51 +0900
From:   Kyuho Choi <chlrbgh0@...il.com>
To:     Avri Altman <Avri.Altman@....com>
Cc:     Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Asutosh Das <asutoshd@...eaurora.org>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Subhash Jadavani <subhashj@...eaurora.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Bean Huo <beanhuo@...ron.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Colin Ian King <colin.king@...onical.com>,
        Bart Van Assche <bvanassche@....org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/3] scsi: ufs: add write booster feature support

Hi Avri,

On 6/23/20, Avri Altman <Avri.Altman@....com> wrote:
>>
>> AFAIK, this device are ufs 2.1. It's not support writebooster.
>>
>> I'd check latest linux scsi branch and ufshcd_wb_config function's
>> called without device capability check.
> Please grep ufshcd_wb_probe.
>
I got your point, but as I mentioned, this device not support wb, this
is old products.

I'm not sure ufshcd_wb_probe are called or not in Rob and Steev's platform.
If it's called, hba->caps are setted with wb diable and this error not occured.
But (it looks) not called, same query error will be occured in
ufshcd_wb_config/ctrl.

BR,
Kyuho Choi