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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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