Re: [Xen-devel] [PATCH 2/3] xen: slightly simplify bufioreq handling

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.11.16 at 19:13, <sstabellini@xxxxxxxxxx> wrote:
> On Wed, 23 Nov 2016, Jan Beulich wrote:
>> There's no point setting fields always receiving the same value on each
>> iteration, as handle_ioreq() doesn't alter them anyway. Set state and
>> count once ahead of the loop, drop the redundant clearing of
>> data_is_ptr, and avoid the meaningless setting of df altogether.
> 
> Why setting df is meaningless?

With count being fixed to one there's no need to update addresses,
and hence no use for knowing which direction the updates should go.

Jan


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