linux-kernel - [PATCH for-next 17/32] scsi: mac53c94: Replace spin_lock_irqsave with spin

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Message-ID: <1612697823-8073-18-git-send-email-tanxiaofei@huawei.com>
Date:   Sun, 7 Feb 2021 19:36:48 +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 17/32] scsi: mac53c94: 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/mac53c94.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/mac53c94.c b/drivers/scsi/mac53c94.c
index 9e98977..ab59c79 100644
--- a/drivers/scsi/mac53c94.c
+++ b/drivers/scsi/mac53c94.c
@@ -182,12 +182,11 @@ static void mac53c94_start(struct fsc_state *state)
 
 static irqreturn_t do_mac53c94_interrupt(int irq, void *dev_id)
 {
-	unsigned long flags;
 	struct Scsi_Host *dev = ((struct fsc_state *) dev_id)->current_req->device->host;
 	
-	spin_lock_irqsave(dev->host_lock, flags);
+	spin_lock(dev->host_lock);
 	mac53c94_interrupt(irq, dev_id);
-	spin_unlock_irqrestore(dev->host_lock, flags);
+	spin_unlock(dev->host_lock);
 	return IRQ_HANDLED;
 }
 
-- 
2.8.1