linux-kernel - [PATCH] dma: idma64: replace spin_lock_irqsave with spin

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Message-Id: <1536346930-6842-1-git-send-email-yuanzhx326@gmail.com>
Date:   Sat,  8 Sep 2018 06:02:10 +1100
From:   Zhaoxiong Yuan <yuanzhx326@...il.com>
To:     dan.j.williams@...el.com, vkoul@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhaoxiong Yuan <yuanzhx326@...il.com>
Subject: [PATCH] dma: idma64: replace spin_lock_irqsave with spin_lock

idma64_chan_irq() is invoked in hardirq handle function, it is unnecessary 
to call spin_lock_irqsave.
Signed-off-by: Zhaoxiong Yuan <yuanzhx326@...il.com>
---
 drivers/dma/idma64.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
index 1fbf9cb..5b9c156 100644
--- a/drivers/dma/idma64.c
+++ b/drivers/dma/idma64.c
@@ -142,9 +142,8 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c,
 {
 	struct idma64_chan *idma64c = &idma64->chan[c];
 	struct idma64_desc *desc;
-	unsigned long flags;
 
-	spin_lock_irqsave(&idma64c->vchan.lock, flags);
+	spin_lock(&idma64c->vchan.lock);
 	desc = idma64c->desc;
 	if (desc) {
 		if (status_err & (1 << c)) {
@@ -161,7 +160,7 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c,
 		if (idma64c->desc == NULL || desc->status == DMA_ERROR)
 			idma64_stop_transfer(idma64c);
 	}
-	spin_unlock_irqrestore(&idma64c->vchan.lock, flags);
+	spin_unlock(&idma64c->vchan.lock);
 }
 
 static irqreturn_t idma64_irq(int irq, void *dev)
-- 
1.9.1