Simon,

On Tue, Jun 17, 2014 at 8:46 PM, Simon Glass <s...@chromium.org> wrote:
> Hi,
>
> On 16 June 2014 14:40, Doug Anderson <diand...@chromium.org> wrote:
>> From: Bill Richardson <wfric...@chromium.org>
>>
>> When communicating with the EC, the cmd_xfer() function should return the
>> number of bytes it received from the EC, or negative on error.
>
> This is just for the I2C tunnel feature, right? If so, I think this
> should be mentioned here. It seems to be affecting ec_i2c_xfer(), not
> cmd_xfer().

No, the tunnel feature is implemented just fine without this (and is
already landed and working).  It looks like the (not yet upstreamed)
ec_i2c_limited_xfer for spring returns this new value directly but I'm
not convinced that's technicall correct.

Bill can correct me if I'm wrong, but I think this is primarily
interesting once we add in cros_ec_dev (the userspace API) which needs
this info.  Until that happens this patch doesn't hurt and just
returns some extra info.

-Doug
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