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Re: [Qemu-trivial] [Qemu-devel] [PATCH 1/5] hw/dma/pxa2xx: Remove superf


From: Eric Blake
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH 1/5] hw/dma/pxa2xx: Remove superfluous memset
Date: Thu, 8 Oct 2015 14:59:56 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

On 10/08/2015 01:35 PM, Thomas Huth wrote:
> g_malloc0 already clears the memory, so no need for
> the additional memset here.
> 
> Signed-off-by: Thomas Huth <address@hidden>
> ---
>  hw/dma/pxa2xx_dma.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/hw/dma/pxa2xx_dma.c b/hw/dma/pxa2xx_dma.c
> index d4501fb..3f0a720 100644
> --- a/hw/dma/pxa2xx_dma.c
> +++ b/hw/dma/pxa2xx_dma.c
> @@ -461,7 +461,6 @@ static int pxa2xx_dma_init(SysBusDevice *sbd)
>  
>      s->chan = g_malloc0(sizeof(PXA2xxDMAChannel) * s->channels);

As long as we're here, this should probably be switched to g_new0(), in
part to avoid any chance that the multiply can overflow.

>  
> -    memset(s->chan, 0, sizeof(PXA2xxDMAChannel) * s->channels);

But this part is correct.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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