[PATCH] staging: fix ignoring return value warning

Greg Kroah-Hartman gregkh at linuxfoundation.org
Sun Feb 7 04:34:18 EST 2021


On Sun, Feb 07, 2021 at 05:23:28PM +0800, Youling Tang wrote:
> Fix the below ignoring return value warning for device_reset.
> 
> drivers/staging/mt7621-dma/mtk-hsdma.c:685:2: warning: ignoring return value
> of function declared with 'warn_unused_result' attribute [-Wunused-result]
>         device_reset(&pdev->dev);
>         ^~~~~~~~~~~~ ~~~~~~~~~~
> drivers/staging/ralink-gdma/ralink-gdma.c:836:2: warning: ignoring return value
> of function declared with 'warn_unused_result' attribute [-Wunused-result]
>         device_reset(&pdev->dev);
>         ^~~~~~~~~~~~ ~~~~~~~~~~
> 
> Signed-off-by: Youling Tang <tangyouling at loongson.cn>
> ---
>  drivers/staging/mt7621-dma/mtk-hsdma.c    | 6 +++++-
>  drivers/staging/ralink-gdma/ralink-gdma.c | 6 +++++-
>  2 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/mt7621-dma/mtk-hsdma.c b/drivers/staging/mt7621-dma/mtk-hsdma.c
> index bc4bb43..d4ffa52 100644
> --- a/drivers/staging/mt7621-dma/mtk-hsdma.c
> +++ b/drivers/staging/mt7621-dma/mtk-hsdma.c
> @@ -682,7 +682,11 @@ static int mtk_hsdma_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	device_reset(&pdev->dev);
> +	ret = device_reset(&pdev->dev);
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to reset device\n");
> +		return ret;
> +	}
>  
>  	dd = &hsdma->ddev;
>  	dma_cap_set(DMA_MEMCPY, dd->cap_mask);
> diff --git a/drivers/staging/ralink-gdma/ralink-gdma.c b/drivers/staging/ralink-gdma/ralink-gdma.c
> index 655df31..df99c47 100644
> --- a/drivers/staging/ralink-gdma/ralink-gdma.c
> +++ b/drivers/staging/ralink-gdma/ralink-gdma.c
> @@ -833,7 +833,11 @@ static int gdma_dma_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	device_reset(&pdev->dev);
> +	ret = device_reset(&pdev->dev);
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to reset device\n");
> +		return ret;
> +	}
>  
>  	dd = &dma_dev->ddev;
>  	dma_cap_set(DMA_MEMCPY, dd->cap_mask);
> -- 
> 2.1.0
> 


Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
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  specified in the MAINTAINERS file for the subsystem you are submitting
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If you wish to discuss this problem further, or you have questions about
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thanks,

greg k-h's patch email bot



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