linux-kernel - Re: [PATCH v3 1/6] dma-buf: Remove the signaled bit status check

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Date:   Mon, 12 Sep 2022 08:44:27 +0200
From:   Christian König <christian.koenig@....com>
To:     Arvind Yadav <Arvind.Yadav@....com>, andrey.grodzovsky@....com,
        shashank.sharma@....com, amaranath.somalapuram@....com,
        Arunpravin.PaneerSelvam@....com, sumit.semwal@...aro.org,
        gustavo@...ovan.org, airlied@...ux.ie, daniel@...ll.ch,
        linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/6] dma-buf: Remove the signaled bit status check

Am 09.09.22 um 19:08 schrieb Arvind Yadav:
> Remove the signaled bit status check because it is returning
> early when the fence is already signaled and
> __dma_fence_enable_signaling is checking the status of signaled
> bit again.
>
> Signed-off-by: Arvind Yadav <Arvind.Yadav@....com>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
>
> Changes in v1, v2: This new patch was not part of previous series.
>
> ---
>   drivers/dma-buf/dma-fence.c | 3 ---
>   1 file changed, 3 deletions(-)
>
> diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
> index 066400ed8841..64c99739ad23 100644
> --- a/drivers/dma-buf/dma-fence.c
> +++ b/drivers/dma-buf/dma-fence.c
> @@ -601,9 +601,6 @@ void dma_fence_enable_sw_signaling(struct dma_fence *fence)
>   {
>   	unsigned long flags;
>   
> -	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
> -		return;
> -
>   	spin_lock_irqsave(fence->lock, flags);
>   	__dma_fence_enable_signaling(fence);
>   	spin_unlock_irqrestore(fence->lock, flags);