linux-kernel - [PATCH for-next 23/32] scsi: nsp32: Replace spin_lock_irqsave with spin

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Message-ID: <1612697823-8073-24-git-send-email-tanxiaofei@huawei.com>
Date:   Sun, 7 Feb 2021 19:36:54 +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 23/32] scsi: nsp32: 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/nsp32.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
index e44b1a0..d927fde 100644
--- a/drivers/scsi/nsp32.c
+++ b/drivers/scsi/nsp32.c
@@ -1152,12 +1152,11 @@ static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
 	struct scsi_cmnd *SCpnt = data->CurrentSC;
 	unsigned short auto_stat, irq_stat, trans_stat;
 	unsigned char busmon, busphase;
-	unsigned long flags;
 	int ret;
 	int handled = 0;
 	struct Scsi_Host *host = data->Host;
 
-	spin_lock_irqsave(host->host_lock, flags);
+	spin_lock(host->host_lock);
 
 	/*
 	 * IRQ check, then enable IRQ mask
@@ -1421,7 +1420,7 @@ static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
 	nsp32_write2(base, IRQ_CONTROL, 0);
 
  out2:
-	spin_unlock_irqrestore(host->host_lock, flags);
+	spin_unlock(host->host_lock);
 
 	nsp32_dbg(NSP32_DEBUG_INTR, "exit");
 
-- 
2.8.1