linux-kernel - [PATCH v4 04/10] scsi: ufs: Enable IRQ after enabling clocks in error handling preparation

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Message-Id: <1624433711-9339-5-git-send-email-cang@codeaurora.org>
Date:   Wed, 23 Jun 2021 00:35:03 -0700
From:   Can Guo <cang@...eaurora.org>
To:     asutoshd@...eaurora.org, nguyenb@...eaurora.org,
        hongwus@...eaurora.org, ziqichen@...eaurora.org,
        linux-scsi@...r.kernel.org, kernel-team@...roid.com,
        cang@...eaurora.org
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....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>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 04/10] scsi: ufs: Enable IRQ after enabling clocks in error handling preparation

In error handling preparation, enable IRQ after enabling clocks in case
unclocked register access happens.

Fixes: c72e79c0ad2bd ("scsi: ufs: Recover HBA runtime PM error in error handler")
Signed-off-by: Can Guo <cang@...eaurora.org>
---
 drivers/scsi/ufs/ufshcd.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ee70522..5f837c4 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5927,13 +5927,14 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
 		 * can be OFF or in LPM.
 		 */
 		ufshcd_setup_hba_vreg(hba, true);
-		ufshcd_enable_irq(hba);
 		ufshcd_setup_vreg(hba, true);
 		ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq);
 		ufshcd_config_vreg_hpm(hba, hba->vreg_info.vccq2);
 		ufshcd_hold(hba, false);
-		if (!ufshcd_is_clkgating_allowed(hba))
+		if (!ufshcd_is_clkgating_allowed(hba)) {
 			ufshcd_setup_clocks(hba, true);
+			ufshcd_enable_irq(hba);
+		}
 		ufshcd_release(hba);
 		pm_op = hba->is_wlu_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
 		ufshcd_vops_resume(hba, pm_op);
-- 
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