From: Konstantin Vyshetsky <vkon@google.com>
Date: Wed, 20 Apr 2022 17:24:29 -0700
Subject: [PATCH] scsi: ufs: core: Increase fDeviceInit poll frequency
Git-commit: a4e6496fca3f32e997e8a3b5c44e2a1ae09d018e
Patch-mainline: v5.19-rc1
References: jsc#PED-1183
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.
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/ufs/ufshcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3f9caafa91bf..ba9c7f9ec424 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4438,7 +4438,7 @@ 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) {
--
2.35.3