[src/trunk]: src/sys/dev/pci Call m_freem(m) only if m0 == NULL.

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

details:   https://anonhg.NetBSD.org/src/rev/04e5b411f70a
branches:  trunk
changeset: 366170:04e5b411f70a
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Tue May 17 00:02:57 2022 +0000

description:
Call m_freem(m) only if m0 == NULL.

diffstat:

 sys/dev/pci/if_wm.c |  14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diffs (44 lines):

diff -r 7aa3dccd4791 -r 04e5b411f70a sys/dev/pci/if_wm.c
--- a/sys/dev/pci/if_wm.c       Mon May 16 22:03:16 2022 +0000
+++ b/sys/dev/pci/if_wm.c       Tue May 17 00:02:57 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_wm.c,v 1.730 2022/05/03 00:23:33 gutteridge Exp $   */
+/*     $NetBSD: if_wm.c,v 1.731 2022/05/17 00:02:57 msaitoh Exp $      */
 
 /*
  * Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -82,7 +82,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.730 2022/05/03 00:23:33 gutteridge Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.731 2022/05/17 00:02:57 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -8016,9 +8016,10 @@
                         * increment successed packet counter as in the case
                         * which the packet is discarded by link down PHY.
                         */
-                       if (m0 != NULL)
+                       if (m0 != NULL) {
                                if_statinc(ifp, if_opackets);
-                       m_freem(m0);
+                               m_freem(m0);
+                       }
                } while (m0 != NULL);
                return;
        }
@@ -8633,9 +8634,10 @@
                         * increment successed packet counter as in the case
                         * which the packet is discarded by link down PHY.
                         */
-                       if (m0 != NULL)
+                       if (m0 != NULL) {
                                if_statinc(ifp, if_opackets);
-                       m_freem(m0);
+                               m_freem(m0);
+                       }
                } while (m0 != NULL);
                return;
        }