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dmaengine: hisi_dma: remove redundant irqsave and irqrestore in hardIRQ

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Running in hardIRQ, disabling IRQ is redundant since hardIRQ has disabled
IRQ. This patch removes the irqsave and irqstore to save some instruction
cycles.

Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Acked-by: Zhou Wang <wangzhou1@hisilicon.com>
Link: https://lore.kernel.org/r/20201027215252.25820-8-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Barry Song
2020-10-28 10:52:49 +13:00
committed by Vinod Koul
parent 1ff2065619
commit d9c8d4b278
1 changed files with 2 additions and 3 deletions
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5
drivers/dma/hisi_dma.c
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@@ -431,9 +431,8 @@ static irqreturn_t hisi_dma_irq(int irq, void *data)
struct hisi_dma_dev *hdma_dev = chan->hdma_dev;
struct hisi_dma_desc *desc;
struct hisi_dma_cqe *cqe;
unsigned long flags;
spin_lock_irqsave(&chan->vc.lock, flags);
spin_lock(&chan->vc.lock);
desc = chan->desc;
cqe = chan->cq + chan->cq_head;
@@ -452,7 +451,7 @@ static irqreturn_t hisi_dma_irq(int irq, void *data)
chan->desc = NULL;
}
spin_unlock_irqrestore(&chan->vc.lock, flags);
spin_unlock(&chan->vc.lock);
return IRQ_HANDLED;
}