linux-kernel - [PATCH for-next 10/32] scsi: bfa: Replace spin_lock_irqsave with spin

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Date:   Sun, 7 Feb 2021 19:36:41 +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 10/32] scsi: bfa: 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/bfa/bfad.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index 440ef32..8c6f3eb 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -1089,25 +1089,24 @@ bfad_intx(int irq, void *dev_id)
 {
 	struct bfad_s	*bfad = dev_id;
 	struct list_head	doneq;
-	unsigned long	flags;
 	bfa_boolean_t rc;
 
-	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	spin_lock(&bfad->bfad_lock);
 	rc = bfa_intx(&bfad->bfa);
 	if (!rc) {
-		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		spin_unlock(&bfad->bfad_lock);
 		return IRQ_NONE;
 	}
 
 	bfa_comp_deq(&bfad->bfa, &doneq);
-	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	spin_unlock(&bfad->bfad_lock);
 
 	if (!list_empty(&doneq)) {
 		bfa_comp_process(&bfad->bfa, &doneq);
 
-		spin_lock_irqsave(&bfad->bfad_lock, flags);
+		spin_lock(&bfad->bfad_lock);
 		bfa_comp_free(&bfad->bfa, &doneq);
-		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		spin_unlock(&bfad->bfad_lock);
 	}
 
 	return IRQ_HANDLED;
@@ -1120,20 +1119,19 @@ bfad_msix(int irq, void *dev_id)
 	struct bfad_msix_s *vec = dev_id;
 	struct bfad_s *bfad = vec->bfad;
 	struct list_head doneq;
-	unsigned long   flags;
 
-	spin_lock_irqsave(&bfad->bfad_lock, flags);
+	spin_lock(&bfad->bfad_lock);
 
 	bfa_msix(&bfad->bfa, vec->msix.entry);
 	bfa_comp_deq(&bfad->bfa, &doneq);
-	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+	spin_unlock(&bfad->bfad_lock);
 
 	if (!list_empty(&doneq)) {
 		bfa_comp_process(&bfad->bfa, &doneq);
 
-		spin_lock_irqsave(&bfad->bfad_lock, flags);
+		spin_lock(&bfad->bfad_lock);
 		bfa_comp_free(&bfad->bfa, &doneq);
-		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+		spin_unlock(&bfad->bfad_lock);
 	}
 
 	return IRQ_HANDLED;
-- 
2.8.1