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From: Zhou Wang <wangzhou1@hisilicon.com>
To: Barry Song <song.bao.hua@hisilicon.com>, <vkoul@kernel.org>,
	<dmaengine@vger.kernel.org>
Subject: Re: [PATCH 07/10] dmaengine: hisi_dma: remove redundant irqsave and irqrestore in hardIRQ
Date: Mon, 26 Oct 2020 09:23:47 +0800
Message-ID: <5F962523.9040802@hisilicon.com> (raw)
In-Reply-To: <20201015235921.21224-8-song.bao.hua@hisilicon.com>

On 2020/10/16 7:59, Barry Song wrote:
> Running in hardIRQ, disabling IRQ is redundant.
> 
> Cc: Zhou Wang <wangzhou1@hisilicon.com>
> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>

Thanks for fixing this :)

Acked-by: Zhou Wang <wangzhou1@hisilicon.com>

> ---
>  drivers/dma/hisi_dma.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
> index e1a958ae7925..a259ee010e9b 100644
> --- a/drivers/dma/hisi_dma.c
> +++ b/drivers/dma/hisi_dma.c
> @@ -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;
>  }
> 

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-15 23:59 [PATCH 00/10] dmaengine: a bundle of cleanup on spin_lock_irqsave/irqrestore Barry Song
2020-10-15 23:59 ` [PATCH 01/10] dmaengine: ipu_idmac: remove redundant irqsave and restore in hardIRQ Barry Song
2020-10-15 23:59 ` [PATCH 02/10] dmaengine: k3-udma: remove redundant irqsave and irqrestore " Barry Song
2020-10-19 13:45   ` Peter Ujfalusi
2020-10-15 23:59 ` [PATCH 03/10] dmaengine: sf-pdma: " Barry Song
2020-10-15 23:59 ` [PATCH 04/10] dmaengine: tegra210-adma: " Barry Song
2020-10-19 10:31   ` Jon Hunter
2020-10-15 23:59 ` [PATCH 05/10] dmaengine: milbeaut-xdmac: " Barry Song
2020-10-15 23:59 ` [PATCH 06/10] dmaengine: k3dma: " Barry Song
2020-10-15 23:59 ` [PATCH 07/10] dmaengine: hisi_dma: " Barry Song
2020-10-26  1:23   ` Zhou Wang [this message]
2020-10-15 23:59 ` [PATCH 08/10] dmaengine: moxart-dma: " Barry Song
2020-10-15 23:59 ` [PATCH 09/10] dmaengine: ste_dma40: " Barry Song
2020-10-29 14:01   ` Linus Walleij
2020-10-29 20:58     ` Song Bao Hua (Barry Song)
2020-10-15 23:59 ` [PATCH 10/10] dmaengine: pxa_dma: " Barry Song
2020-10-23 20:16   ` Robert Jarzmik

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