From: "Martin K. Petersen" <martin.petersen@oracle•com>
To: Can Guo <cang@codeaurora•org>
Cc: nguyenb@codeaurora•org, Alim Akhtar <alim.akhtar@samsung•com>,
Bean Huo <beanhuo@micron•com>,
Stanley Chu <stanley.chu@mediatek•com>,
Bart Van Assche <bvanassche@acm•org>,
saravanak@google•com, Tomas Winkler <tomas.winkler@intel•com>,
kernel-team@android•com, salyzyn@google•com,
"James E.J. Bottomley" <jejb@linux•ibm.com>,
Avri Altman <avri.altman@wdc•com>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists•infradead.org>,
Matthias Brugger <matthias.bgg@gmail•com>,
Bjorn Andersson <bjorn.andersson@linaro•org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists•infradead.org>,
rnayak@codeaurora•org, linux-scsi@vger•kernel.org,
"Martin K. Petersen" <martin.petersen@oracle•com>,
Venkat Gopalakrishnan <venkatg@codeaurora•org>,
open list <linux-kernel@vger•kernel.org>,
hongwus@codeaurora•org, asutoshd@codeaurora•org
Subject: Re: [PATCH v6 2/2] scsi: ufs: Do not rely on prefetched data
Date: Thu, 26 Mar 2020 22:58:19 -0400 [thread overview]
Message-ID: <yq1lfnmcxmc.fsf@oracle.com> (raw)
In-Reply-To: <1585214742-5466-3-git-send-email-cang@codeaurora.org> (Can Guo's message of "Thu, 26 Mar 2020 02:25:41 -0700")
Can,
> 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.
Applied patch #2 to 5.7/scsi-queue. Awaiting Avri's feedback on patch
#1. Thanks!
--
Martin K. Petersen Oracle Linux Engineering
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-03-27 3:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1585214742-5466-1-git-send-email-cang@codeaurora.org>
2020-03-26 9:25 ` [PATCH v6 2/2] scsi: ufs: Do not rely on prefetched data Can Guo
2020-03-27 2:58 ` Martin K. Petersen [this message]
2020-03-27 7:49 ` Avri Altman
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