linux-kernel - [PATCH for-next 18/32] scsi: mesh: Replace spin_lock_irqsave with spin

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Message-ID: <1612697823-8073-19-git-send-email-tanxiaofei@huawei.com>
Date:   Sun, 7 Feb 2021 19:36:49 +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 18/32] scsi: mesh: 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/mesh.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index 0a9f4e4..67c660a 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1018,13 +1018,12 @@ static void handle_reset(struct mesh_state *ms)
 
 static irqreturn_t do_mesh_interrupt(int irq, void *dev_id)
 {
-	unsigned long flags;
 	struct mesh_state *ms = dev_id;
 	struct Scsi_Host *dev = ms->host;
 	
-	spin_lock_irqsave(dev->host_lock, flags);
+	spin_lock(dev->host_lock);
 	mesh_interrupt(ms);
-	spin_unlock_irqrestore(dev->host_lock, flags);
+	spin_unlock(dev->host_lock);
 	return IRQ_HANDLED;
 }
 
-- 
2.8.1