linux-kernel - [PATCH for-next 09/32] scsi: aha1740: Replace spin_lock_irqsave with spin

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Message-ID: <1612697823-8073-10-git-send-email-tanxiaofei@huawei.com>
Date:   Sun, 7 Feb 2021 19:36:40 +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 09/32] scsi: aha1740: 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/aha1740.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/aha1740.c b/drivers/scsi/aha1740.c
index 0dc8310..fd9787d 100644
--- a/drivers/scsi/aha1740.c
+++ b/drivers/scsi/aha1740.c
@@ -214,14 +214,13 @@ static irqreturn_t aha1740_intr_handle(int irq, void *dev_id)
 	struct ecb *ecbptr;
 	struct scsi_cmnd *SCtmp;
 	unsigned int base;
-	unsigned long flags;
 	int handled = 0;
 	struct aha1740_sg *sgptr;
 	struct eisa_device *edev;
 	
 	if (!host)
 		panic("aha1740.c: Irq from unknown host!\n");
-	spin_lock_irqsave(host->host_lock, flags);
+	spin_lock(host->host_lock);
 	base = host->io_port;
 	number_serviced = 0;
 	edev = HOSTDATA(host)->edev;
@@ -308,7 +307,7 @@ static irqreturn_t aha1740_intr_handle(int irq, void *dev_id)
 		number_serviced++;
 	}
 
-	spin_unlock_irqrestore(host->host_lock, flags);
+	spin_unlock(host->host_lock);
 	return IRQ_RETVAL(handled);
 }
 
-- 
2.8.1