linux-kernel - [PATCH for-next 19/32] scsi: mvumi: Replace spin_lock_irqsave with spin

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Message-ID: <1612697823-8073-20-git-send-email-tanxiaofei@huawei.com>
Date:   Sun, 7 Feb 2021 19:36:50 +0800
From:   Xiaofei Tan <tanxiaofei@...wei.com>
To:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...neuler.org>, Xiaofei Tan <tanxiaofei@...wei.com>
Subject: [PATCH for-next 19/32] scsi: mvumi: Replace spin_lock_irqsave with spin_lock in hard IRQ

It is redundant to do irqsave and irqrestore in hardIRQ context, where
it has been in a irq-disabled context.

Signed-off-by: Xiaofei Tan <tanxiaofei@...wei.com>
---
 drivers/scsi/mvumi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index 71b6a1f..b36164c 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -1790,11 +1790,10 @@ static void mvumi_handle_clob(struct mvumi_hba *mhba)
 static irqreturn_t mvumi_isr_handler(int irq, void *devp)
 {
 	struct mvumi_hba *mhba = (struct mvumi_hba *) devp;
-	unsigned long flags;
 
-	spin_lock_irqsave(mhba->shost->host_lock, flags);
+	spin_lock(mhba->shost->host_lock);
 	if (unlikely(mhba->instancet->clear_intr(mhba) || !mhba->global_isr)) {
-		spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+		spin_unlock(mhba->shost->host_lock);
 		return IRQ_NONE;
 	}
 
@@ -1815,7 +1814,7 @@ static irqreturn_t mvumi_isr_handler(int irq, void *devp)
 	mhba->isr_status = 0;
 	if (mhba->fw_state == FW_STATE_STARTED)
 		mvumi_handle_clob(mhba);
-	spin_unlock_irqrestore(mhba->shost->host_lock, flags);
+	spin_unlock(mhba->shost->host_lock);
 	return IRQ_HANDLED;
 }
 
-- 
2.8.1