hyperv: Add comments for the extended buffer after RNDIS message

Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 1e88a1095934..06f8601f32fc 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -46,8 +46,14 @@ struct rndis_request {
         /* Simplify allocation by having a netvsc packet inline */
         struct hv_netvsc_packet pkt;
         struct hv_page_buffer buf;
-        /* FIXME: We assumed a fixed size request here. */
+
         struct rndis_message request_msg;
+        /*
+         * The buffer for the extended info after the RNDIS message. It's
+         * referenced based on the data offset in the RNDIS message. Its size
+         * is enough for current needs, and should be sufficient for the near
+         * future.
+         */
         u8 ext[100];
 };