linux-kernel - Re: [PATCH] skd: fix unchecked return values

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Date:   Mon, 22 Oct 2018 11:14:57 +0200
From:   Christoph Hellwig <hch@....de>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Bart Van Assche <bvanassche@....org>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@....de>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] skd: fix unchecked return values

On Fri, Oct 19, 2018 at 08:44:17PM +0200, Gustavo A. R. Silva wrote:
> Check return values of dma_set_mask_and_coherent().
> 
> Otherwise, if dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
> fails, the following piece of code will be executed even when the call
> to dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); returns 0:
> 
> dev_err(&pdev->dev, "DMA mask error %d\n", rc);
> goto err_out_regions;
> 
> Addresses-Coverity-ID: 1474553 ("Unchecked return value")
> Fixes: 138126214868 ("skd: switch to the generic DMA API")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Thanks, looks good:

Reviewed-by: Christoph Hellwig <hch@....de>