On Tue, 13 Apr 2021 07:32:47 -0700 Ben Widawsky <ben.widaw...@intel.com> wrote:
> Signed-off-by: Ben Widawsky <ben.widaw...@intel.com> Sensible update. Acked-by: Jonathan Cameron <jonathan.came...@huawei.com> > --- > include/uapi/linux/cxl_mem.h | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h > index f6e8a005b113..8dd516ddb098 100644 > --- a/include/uapi/linux/cxl_mem.h > +++ b/include/uapi/linux/cxl_mem.h > @@ -81,6 +81,13 @@ static const struct { > * - @size_in = -1 > * - @size_out = 0 > * > + * Commands which have a variable length input likely have a minimum length. > + * This is not enforced by the UAPI, and therefore might look like the > command > + * succeeded when sending too small of an input payload. Caution should be > taken > + * by checking the @cxl_send_command.retval for such cases. For commands > with a > + * variable length output, the caller is free to consume as little or as > much as > + * they want. > + * > * See struct cxl_mem_query_commands. > */ > struct cxl_command_info {