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Message-ID: <1584366454.14250.12.camel@mtksdccf07>
Date:   Mon, 16 Mar 2020 21:47:34 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     Can Guo <cang@...eaurora.org>
CC:     <asutoshd@...eaurora.org>, <nguyenb@...eaurora.org>,
        <hongwus@...eaurora.org>, <rnayak@...eaurora.org>,
        <linux-scsi@...r.kernel.org>, <kernel-team@...roid.com>,
        <saravanak@...gle.com>, <salyzyn@...gle.com>,
        "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>,
        Bean Huo <beanhuo@...ron.com>,
        "Bart Van Assche" <bvanassche@....org>,
        Venkat Gopalakrishnan <venkatg@...eaurora.org>,
        Tomas Winkler <tomas.winkler@...el.com>,
        "Bjorn Andersson" <bjorn.andersson@...aro.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] scsi: ufs: Do not rely on prefetched data

Hi Can,

On Mon, 2020-03-16 at 00:06 -0700, Can Guo wrote:
> We were setting bActiveICCLevel attribute for UFS device only once but
> type of this attribute has changed from persistent to volatile since UFS
> device specification v2.1. This attribute is set to the default value after
> power cycle or hardware reset event. It isn't safe to rely on prefetched
> data (only used for bActiveICCLevel attribute now). Hence this change
> removes the code related to data prefetching and set this parameter on
> every attempt to probe the UFS device.
> 
> Signed-off-by: Can Guo <cang@...eaurora.org>

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


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