BACKPORT: scsi: ufs: core: Increase fDeviceInit poll frequency
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 a4e6496fca3f32e997e8a3b5c44e2a1ae09d018e)
Change-Id: I3a9a01853e89ea73ff5e355007db4730fa853ea0
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b9df2db..45ee1ad 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4553,7 +4553,7 @@
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) {
