linux-kernel - Re: [PATCH] dma: bcm2835: Fix compiler warning on arm64.

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]

Date:	Mon, 6 Jun 2016 09:53:38 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Eric Anholt <eric@...olt.net>
Cc:	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Stephen Warren <swarren@...dotorg.org>,
	Lee Jones <lee@...nel.org>, dmaengine@...r.kernel.org
Subject: Re: [PATCH] dma: bcm2835: Fix compiler warning on arm64.

On Fri, Jun 03, 2016 at 07:23:33PM -0700, Eric Anholt wrote:
> The min() macro was complaining about mismatched types.  The max len
> is at most SZ_1G, so we can just put it in an unsigned int.
> 
> Signed-off-by: Eric Anholt <eric@...olt.net>
> ---
> 
> Vinod, if you ack it, this one would be nice to be able to merge
> through the -soc tree, so that when we enable of arm64 builds of this
> driver we don't introduce a new compiler warning.
> 
>  drivers/dma/bcm2835-dma.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
> index 6149b27c33ad..1fa11fc067c6 100644
> --- a/drivers/dma/bcm2835-dma.c
> +++ b/drivers/dma/bcm2835-dma.c
> @@ -393,7 +393,7 @@ static void bcm2835_dma_fill_cb_chain_with_sg(
>  	unsigned int sg_len)
>  {
>  	struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
> -	size_t max_len = bcm2835_dma_max_frame_length(c);
> +	unsigned int max_len = bcm2835_dma_max_frame_length(c);

bcm2835_dma_max_frame_length() returns size_t. so this should also add a
complain about type mismatch as well!

Also, wouldn't it be better to make both args of min()  as size_t then?

>  	unsigned int i, len;
>  	dma_addr_t addr;
>  	struct scatterlist *sgent;
> -- 
> 2.8.0.rc3
> 

Thanks
-- 
~Vinod