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BACKPORT: scsi: ufs: core: Increase fDeviceInit poll frequency

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UFS devices are expected to clear fDeviceInit flag in single digit
milliseconds. Current values of 5 to 10 millisecond sleep add to increased
latency during the initialization and resume path. This CL lowers the sleep
range to 500 to 1000 microseconds.

Bug: 236993021
Link: https://lore.kernel.org/r/20220421002429.3136933-1-bvanassche@acm.org
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Konstantin Vyshetsky <vkon@google.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit a4e6496fca)
Change-Id: I3a9a01853e89ea73ff5e355007db4730fa853ea0
This commit is contained in:
Konstantin Vyshetsky
2022-04-20 17:24:29 -07:00
committed by Jaegeuk Kim
parent eaa7364bf7
commit eef3b6ff41
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/ufs/ufshcd.c
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@@ -4380,7 +4380,7 @@ static int ufshcd_complete_dev_init(struct ufs_hba *hba)
QUERY_FLAG_IDN_FDEVICEINIT, 0, &flag_res);
if (!flag_res)
break;
usleep_range(5000, 10000);
usleep_range(500, 1000);
} while (ktime_before(ktime_get(), timeout));
if (err) {