linux-kernel - [PATCH v5 6/7] scsi: ufs: Abort gating if clock on request is pending

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Message-Id: <1573798172-20534-7-git-send-email-cang@codeaurora.org>
Date:   Thu, 14 Nov 2019 22:09:29 -0800
From:   Can Guo <cang@...eaurora.org>
To:     asutoshd@...eaurora.org, nguyenb@...eaurora.org,
        rnayak@...eaurora.org, linux-scsi@...r.kernel.org,
        kernel-team@...roid.com, saravanak@...gle.com, salyzyn@...gle.com,
        cang@...eaurora.org
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Pedro Sousa <pedrom.sousa@...opsys.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Bean Huo <beanhuo@...ron.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Venkat Gopalakrishnan <venkatg@...eaurora.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 6/7] scsi: ufs: Abort gating if clock on request is pending

From: Asutosh Das <asutoshd@...eaurora.org>

This change attempts to abort gating of clocks if a
request to turn-on clocks is pending.
This would in turn avoid turning OFF and back ON the
clocks.

Signed-off-by: Asutosh Das <asutoshd@...eaurora.org>
Signed-off-by: Can Guo <cang@...eaurora.org>
Reviewed-by: Bean Huo <beanhuo@...ron.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 c3527e4..d662641 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1610,7 +1610,7 @@ static void ufshcd_gate_work(struct work_struct *work)
 	 * state to CLKS_ON.
 	 */
 	if (hba->clk_gating.is_suspended ||
-		(hba->clk_gating.state == REQ_CLKS_ON)) {
+		(hba->clk_gating.state != REQ_CLKS_OFF)) {
 		hba->clk_gating.state = CLKS_ON;
 		trace_ufshcd_clk_gating(dev_name(hba->dev),
 					hba->clk_gating.state);
-- 
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