linux-kernel - Re: [PATCHv2 8/8] videobuf2: handle non-contiguous DMA allocations

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:   Thu, 17 Jun 2021 16:56:58 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Ricardo Ribalda <ribalda@...omium.org>,
        Christoph Hellwig <hch@....de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 8/8] videobuf2: handle non-contiguous DMA allocations

On (21/06/03 13:59), Hans Verkuil wrote:
> >  
> > +static void __vb2_dc_put(struct vb2_dc_buf *buf)
> > +{
> > +	if (buf->coherent_mem) {
> > +		dma_free_attrs(buf->dev, buf->size, buf->cookie,
> > +			       buf->dma_addr, buf->attrs);
> > +		return;
> > +	}
> > +
> > +	if (buf->vaddr)
> > +		dma_vunmap_noncontiguous(buf->dev, buf->vaddr);
> > +	dma_free_noncontiguous(buf->dev, buf->size,
> > +			       buf->dma_sgt, buf->dma_addr);
> > +}
> 
> Is there a reason for creating __vb2_dc_put()? I found it more
> a hindrance when reviewing than an advantage. I prefer to have
> it moved to vb2_dc_put, that way all the clean up happens in that
> single function.

Done.