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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 <avri.altman@wdc.com>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2020-03-18 18:40:15 +08:00 committed by Martin K. Petersen
parent b9dc8aca28
commit 9fc305ef8e
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/ufs/ufshcd.c
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@ -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 */