scsi: ufs: Do not rely on prefetched data

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We were setting bActiveICCLevel attribute for UFS device only once but the
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.

Tested-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Can Guo 2020-03-26 02:25:41 -07:00 • committed by Martin K. Petersen

parent ccfa00a868

commit e89860f196

2 changed files with 15 additions and 22 deletions

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26

drivers/scsi/ufs/ufshcd.c

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11

drivers/scsi/ufs/ufshcd.h

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