linux-kernel - Re: [PATCH] dmaengine: altera-msgdma: Remove useless DMA-32 fallback configuration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <506398f4-94a8-f2d4-999c-1c14863cd78f@denx.de>
Date:   Mon, 17 Jan 2022 07:03:14 +0100
From:   Stefan Roese <sr@...x.de>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Olivier Dautricourt <olivier.dautricourt@...lia.com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        dmaengine@...r.kernel.org
Subject: Re: [PATCH] dmaengine: altera-msgdma: Remove useless DMA-32 fallback
 configuration

On 1/15/22 08:40, Christophe JAILLET wrote:
> As stated in [1], dma_set_mask() with a 64-bit mask never fails if
> dev->dma_mask is non-NULL.
> So, if it fails, the 32 bits case will also fail for the same reason.
> 
> Simplify code and remove some dead code accordingly.
> 
> [1]: https://lore.kernel.org/linux-kernel/YL3vSPK5DXTNvgdx@infradead.org/#t
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Stefan Roese <sr@...x.de>

Thanks,
Stefan

> ---
>   drivers/dma/altera-msgdma.c | 4 +---
>   1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
> index f5b885d69cd3..6f56dfd375e3 100644
> --- a/drivers/dma/altera-msgdma.c
> +++ b/drivers/dma/altera-msgdma.c
> @@ -891,9 +891,7 @@ static int msgdma_probe(struct platform_device *pdev)
>   	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
>   	if (ret) {
>   		dev_warn(&pdev->dev, "unable to set coherent mask to 64");
> -		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
> -		if (ret)
> -			goto fail;
> +		goto fail;
>   	}
>   
>   	msgdma_reset(mdev);
> 

Viele Grüße,
Stefan Roese

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@...x.de