linux-kernel - [PATCH] dmaengine: sf-pdma: apply proper spinlock flags in sf_pdma_prep_dma

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Message-ID: <20210611065336.GA1121@raspberrypi>
Date:   Fri, 11 Jun 2021 07:53:36 +0100
From:   Austin Kim <austindh.kim@...il.com>
To:     green.wan@...ive.com, vkoul@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        austindh.kim@...il.com, austin.kim@....com
Subject: [PATCH] dmaengine: sf-pdma: apply proper spinlock flags in
 sf_pdma_prep_dma_memcpy()

From: Austin Kim <austin.kim@....com>

The second parameter of spinlock_irq[save/restore] function is flags,
which is the last input parameter of sf_pdma_prep_dma_memcpy().

So declare local variable 'iflags' to be used as the second parameter of
spinlock_irq[save/restore] function.

Signed-off-by: Austin Kim <austin.kim@....com>
---
 drivers/dma/sf-pdma/sf-pdma.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/sf-pdma/sf-pdma.c b/drivers/dma/sf-pdma/sf-pdma.c
index c4c4e8575764..f12606aeff87 100644
--- a/drivers/dma/sf-pdma/sf-pdma.c
+++ b/drivers/dma/sf-pdma/sf-pdma.c
@@ -94,6 +94,7 @@ sf_pdma_prep_dma_memcpy(struct dma_chan *dchan,	dma_addr_t dest, dma_addr_t src,
 {
 	struct sf_pdma_chan *chan = to_sf_pdma_chan(dchan);
 	struct sf_pdma_desc *desc;
+	unsigned long iflags;
 
 	if (chan && (!len || !dest || !src)) {
 		dev_err(chan->pdma->dma_dev.dev,
@@ -109,10 +110,10 @@ sf_pdma_prep_dma_memcpy(struct dma_chan *dchan,	dma_addr_t dest, dma_addr_t src,
 	desc->dirn = DMA_MEM_TO_MEM;
 	desc->async_tx = vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
 
-	spin_lock_irqsave(&chan->vchan.lock, flags);
+	spin_lock_irqsave(&chan->vchan.lock, iflags);
 	chan->desc = desc;
 	sf_pdma_fill_desc(desc, dest, src, len);
-	spin_unlock_irqrestore(&chan->vchan.lock, flags);
+	spin_unlock_irqrestore(&chan->vchan.lock, iflags);
 
 	return desc->async_tx;
 }
-- 
2.20.1