From: Bart Van Assche <bvanassche@acm.org>
To: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
linux-scsi@vger.kernel.org,
Konstantin Vyshetsky <vkon@google.com>,
Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH] scsi: ufs: Increase fDeviceInit poll frequency
Date: Wed, 20 Apr 2022 17:24:29 -0700 [thread overview]
Message-ID: <20220421002429.3136933-1-bvanassche@acm.org> (raw)
From: Konstantin Vyshetsky <vkon@google.com>
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.
Signed-off-by: Konstantin Vyshetsky <vkon@google.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
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) {
next reply other threads:[~2022-04-21 0:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-21 0:24 Bart Van Assche [this message]
2022-04-24 6:42 ` [PATCH] scsi: ufs: Increase fDeviceInit poll frequency Avri Altman
2022-04-26 2:35 ` Martin K. Petersen
2022-05-03 0:51 ` Martin K. Petersen
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