linux-kernel - [PATCH] scsi: ufs: add missing host_lock in setup_xfer

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Date:   Wed, 30 Jun 2021 17:51:17 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Can Guo <cang@...eaurora.org>, Bean Huo <beanhuo@...ron.com>,
        Bart Van Assche <bvanassche@....org>,
        Asutosh Das <asutoshd@...eaurora.org>
Subject: [PATCH] scsi: ufs: add missing host_lock in setup_xfer_req

This patch adds a host_lock which existed before on ufshcd_vops_setup_xfer_req.

Cc: Stanley Chu <stanley.chu@...iatek.com>
Cc: Can Guo <cang@...eaurora.org>
Cc: Bean Huo <beanhuo@...ron.com>
Cc: Bart Van Assche <bvanassche@....org>
Cc: Asutosh Das <asutoshd@...eaurora.org>
Fixes: a45f937110fa ("scsi: ufs: Optimize host lock on transfer requests send/compl paths")
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 drivers/scsi/ufs/ufshcd.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index c98d540ac044..194755c9ddfe 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -1229,8 +1229,13 @@ static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
 static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
 					bool is_scsi_cmd)
 {
-	if (hba->vops && hba->vops->setup_xfer_req)
-		return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
+	if (hba->vops && hba->vops->setup_xfer_req) {
+		unsigned long flags;
+
+		spin_lock_irqsave(hba->host->host_lock, flags);
+		hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
+		spin_unlock_irqrestore(hba->host->host_lock, flags);
+	}
 }
 
 static inline void ufshcd_vops_setup_task_mgmt(struct ufs_hba *hba,
-- 
2.32.0.93.g670b81a890-goog