From: jun qian <hangdianqj@163.com>
To: Dan Williams <dan.j.williams@intel.com>, Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
jun qian <hangdianqj@163.com>, Barry song <21cnbao@gmail.com>
Subject: dmaengine: idma64: replace spin_lock_irqsave with spin_lock in ISR
Date: Tue, 11 Sep 2018 07:37:27 -0700 [thread overview]
Message-ID: <20180911143727.53147-1-hangdianqj@163.com> (raw)
As you are already in ISR, it is unnecessary to call spin_lock_irqsave.
Signed-off-by: jun qian <hangdianqj@163.com>
Cc: Barry song <21cnbao@gmail.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 1fbf9cb9b742..5b9c1566ad73 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)
reply other threads:[~2018-09-11 14:37 UTC|newest]
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