linux-kernel - Re: [PATCH] dmaengine: plx_dma: Move spin_lock_bh() to spin

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Date:   Wed, 20 Apr 2022 16:00:04 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Yunbo Yu <yuyunbo519@...il.com>
Cc:     logang@...tatee.com, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: plx_dma: Move spin_lock_bh() to spin_lock()

On 18-04-22, 22:20, Yunbo Yu wrote:
> It is unnecessary to call spin_lock_bh() for you are already in a tasklet.

call spin_lock_bh() if you are already in a ..


With that fixed, applied. Thanks
> 
> Signed-off-by: Yunbo Yu <yuyunbo519@...il.com>
> ---
>  drivers/dma/plx_dma.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/plx_dma.c b/drivers/dma/plx_dma.c
> index 1ffcb5ca9788..12725fa1655f 100644
> --- a/drivers/dma/plx_dma.c
> +++ b/drivers/dma/plx_dma.c
> @@ -137,7 +137,7 @@ static void plx_dma_process_desc(struct plx_dma_dev *plxdev)
>  	struct plx_dma_desc *desc;
>  	u32 flags;
>  
> -	spin_lock_bh(&plxdev->ring_lock);
> +	spin_lock(&plxdev->ring_lock);
>  
>  	while (plxdev->tail != plxdev->head) {
>  		desc = plx_dma_get_desc(plxdev, plxdev->tail);
> @@ -165,7 +165,7 @@ static void plx_dma_process_desc(struct plx_dma_dev *plxdev)
>  		plxdev->tail++;
>  	}
>  
> -	spin_unlock_bh(&plxdev->ring_lock);
> +	spin_unlock(&plxdev->ring_lock);
>  }
>  
>  static void plx_dma_abort_desc(struct plx_dma_dev *plxdev)
> -- 
> 2.25.1

-- 
~Vinod