[src/trunk]: src/sys/dev/pci Add a comment about RSS and remove a wrong comment

[yamaguchi <yamaguchi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d834d192dc16
branches:  trunk
changeset: 745215:d834d192dc16
user:      yamaguchi <yamaguchi%NetBSD.org@localhost>
date:      Tue Feb 25 08:05:24 2020 +0000

description:
Add a comment about RSS and remove a wrong comment

pointed out and reviewed by knakahara@n.o., thanks

diffstat:

 sys/dev/pci/if_ixl.c |  10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diffs (38 lines):

diff -r e4f419b6d0d0 -r d834d192dc16 sys/dev/pci/if_ixl.c
--- a/sys/dev/pci/if_ixl.c      Tue Feb 25 08:02:29 2020 +0000
+++ b/sys/dev/pci/if_ixl.c      Tue Feb 25 08:05:24 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ixl.c,v 1.55 2020/02/25 08:02:29 yamaguchi Exp $    */
+/*     $NetBSD: if_ixl.c,v 1.56 2020/02/25 08:05:24 yamaguchi Exp $    */
 
 /*
  * Copyright (c) 2013-2015, Intel Corporation
@@ -74,7 +74,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_ixl.c,v 1.55 2020/02/25 08:02:29 yamaguchi Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_ixl.c,v 1.56 2020/02/25 08:05:24 yamaguchi Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -4805,6 +4805,11 @@
        uint64_t set_hena = 0;
        uint32_t hena0, hena1;
 
+       /*
+        * We use TCP/UDP with IPv4/IPv6 by default.
+        * Note: the device can not use just IP header in each
+        * TCP/UDP packets for the RSS hash calculation.
+        */
        if (sc->sc_mac_type == I40E_MAC_X722)
                set_hena = IXL_RSS_HENA_DEFAULT_X722;
        else
@@ -5713,7 +5718,6 @@
        baudrate = ixl_search_link_speed(status->link_speed);
 
 done:
-       /* NET_ASSERT_LOCKED() except during attach */
        sc->sc_media_active = ifm_active;
        sc->sc_media_status = ifm_status;