Re: [Qemu-devel] [PATCH v3] Replace bdrv_* to bdrv_aio_* functions in DMA mode in fdc.c.

[Zhi Hui Li]

I think what you say up is right, I will correct them, thank you very much!

> > +        bdrv_aio_readv(cur_drv->bs, fd_sector(cur_drv),
> > +&fdctrl->qiov, fdc_sector_num, fdctrl_read_DMA_cb, opaque_cb);
> > +        return dma_len;
>
> Should be return 0 since we haven't completed I/O yet.
>
> Stefan

I think the return value is not used not, so no matter what is returned 
it not necessary.

if set the dma_len = 0, when call void DMA_set_return(int nret)
function will return the real value;

:)