linux-kernel - Re: [PATCH] scsi: ufs: Adjust logic in common ADAPT helper

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Date:   Sun, 22 Nov 2020 00:23:07 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
CC:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Can Guo <cang@...eaurora.org>,
        Asutosh Das <asutoshd@...eaurora.org>,
        Bean Huo <beanhuo@...ron.com>, <linux-scsi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH] scsi: ufs: Adjust logic in common ADAPT helper

On Fri, 2020-11-20 at 20:48 -0800, Bjorn Andersson wrote:
> The introduction of ufshcd_dme_configure_adapt() refactored out
> duplication from the Mediatek and Qualcomm drivers.
> 
> Both these implementations had the logic of:
>     gear_tx == UFS_HS_G4 => PA_INITIAL_ADAPT
>     gear_tx != UFS_HS_G4 => PA_NO_ADAPT
> 
> but now both implementations pass PA_INITIAL_ADAPT as "adapt_val" and if
> gear_tx is not UFS_HS_G4 that is replaced with PA_INITIAL_ADAPT. In
> other words, it's PA_INITIAL_ADAPT in both above cases.
> 
> The result is that e.g. Qualcomm SM8150 has no longer functional UFS, so
> adjust the logic to match the previous implementation.
> 
> Fixes: fc85a74e28fe ("scsi: ufs: Refactor ADAPT configuration function")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Thanks for the fix.

Reviewed-by: Stanley Chu <stanley.chu@...iatek.com>