From 9fc305ef8eb583b3139643f90abbe38d1c2412ce Mon Sep 17 00:00:00 2001 From: Stanley Chu Date: Wed, 18 Mar 2020 18:40:15 +0800 Subject: scsi: ufs: make HCE polling more compact to improve initialization latency Reduce the waiting period between each HCE (Host Controller Enable) polling from 5 ms to 1 ms. Also increase the maximum polling times to make "total polling time" roughly the same. This change could make HCE initialization faster to improve latency of ufshcd initialization, error recovery, and resume behaviors. Link: https://lore.kernel.org/r/20200318104016.28049-7-stanley.chu@mediatek.com Reviewed-by: Avri Altman Reviewed-by: Can Guo Signed-off-by: Stanley Chu Signed-off-by: Martin K. Petersen --- drivers/scsi/ufs/ufshcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/ufs') diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 01839eef08cb..153743eef082 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4238,7 +4238,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) ufshcd_delay_us(hba->hba_enable_delay_us, 100); /* wait for the host controller to complete initialization */ - retry = 10; + retry = 50; while (ufshcd_is_hba_active(hba)) { if (retry) { retry--; @@ -4247,7 +4247,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) "Controller enable failed\n"); return -EIO; } - usleep_range(5000, 5100); + usleep_range(1000, 1100); } /* enable UIC related interrupts */ -- cgit v1.2.3