Re: [PATCH v15 11/11] RFC: fw_cfg: do DMA read operation

[Marc-Andrà Lureau]

Hi

On Wed, Feb 28, 2018 at 6:17 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> On Wed, Feb 28, 2018 at 04:41:51PM +0100, Marc-Andrà Lureau wrote:
>> I don't know if it's always safe to enable dma in read_raw(), how
>> could we know? Is there a check we could use to choose one or ther
>> other (and thus avoiding explicit dma/readfn argument)?
>
> IMHO the way to go is not to try to do zero copy.
> Allocate a buffer and DMA there, then copy.

Sounds fine to me, I'll resend this patch separately if the rest from
v16 is applied.

thanks