Re: [Qemu-devel] [PATCH v2] rtl8139: Fix invalid IO access alignment

[Julian Pidancet]

On Mon, Nov 14, 2011 at 8:35 PM, Julian Pidancet
<address@hidden> wrote:
> This patch makes iPXE work with the rtl8139 emulation. The rtl8139
> driver in iPXE issues a 16bit access on the ChipCmd register
> (offset 0x37) to check the status of the rx buffer. The offset of the
> ioport access was getting fixed up to 0x36 in qemu, causing the value
> read in iPXE to be invalid.
>
> This fixes an issue with iPXE reporting timeouts during TFTP transfers.
>
> v2: Remove completely the 0xff masks as they're useless since the
> calling functions already do the job.
>

FYI: I just sent a patch on the iPXE mailing list:
http://lists.ipxe.org/pipermail/ipxe-devel/2011-November/001000.html