linux-kernel - [PATCH v1] scsi: ufs: modify Tactive time setting conditions

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Message-Id: <20220106194804.23892-1-hy50.seo@samsung.com>
Date:   Fri,  7 Jan 2022 04:48:04 +0900
From:   SEO HOYOUNG <hy50.seo@...sung.com>
To:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kwmad.kim@...sung.com, alim.akhtar@...sung.com,
        avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, beanhuo@...ron.com,
        asutoshd@...eaurora.org, cang@...eaurora.org, bvanassche@....org,
        grant.jung@...sung.com, junwoo80.lee@...sung.com,
        bhoon95.kim@...sung.com
Cc:     SEO HOYOUNG <hy50.seo@...sung.com>
Subject: [PATCH v1] scsi: ufs: modify Tactive time setting conditions

The Tactive time determine the waiting time before burst
at hibern8 exit and is determined by H/W at linkup state
However, in the case of samsung devices, guided host's Tactive time +100us
for stability.
If the HCI's Tactive time is equal or greater than the device, +100us should be set.

Change-Id: Ie9b502c69264d3e5931ee8b515388094441fa065
Signed-off-by: SEO HOYOUNG <hy50.seo@...sung.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 1049e41abd5b..460d2b440d2e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7815,7 +7815,7 @@ static int ufshcd_quirk_tune_host_pa_tactivate(struct ufs_hba *hba)
 	peer_pa_tactivate_us = peer_pa_tactivate *
 			     gran_to_us_table[peer_granularity - 1];
 
-	if (pa_tactivate_us > peer_pa_tactivate_us) {
+	if (pa_tactivate_us >= peer_pa_tactivate_us) {
 		u32 new_peer_pa_tactivate;
 
 		new_peer_pa_tactivate = pa_tactivate_us /
-- 
2.26.0