[src/trunk]: src/sys/dev/usb usbnet: Simplify usbnet_isdying.

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

details:   https://anonhg.NetBSD.org/src/rev/9f423e713523
branches:  trunk
changeset: 362483:9f423e713523
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Thu Mar 03 05:46:50 2022 +0000

description:
usbnet: Simplify usbnet_isdying.

usbnet_detach (or its caller) stops all users before it returns.

If un->un_pri is null at this point, there's a bug -- something
didn't wait for everything to finish before calling usbnet_detach.

diffstat:

 sys/dev/usb/usbnet.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r b7e5f31a8555 -r 9f423e713523 sys/dev/usb/usbnet.c
--- a/sys/dev/usb/usbnet.c      Wed Mar 02 19:32:15 2022 +0000
+++ b/sys/dev/usb/usbnet.c      Thu Mar 03 05:46:50 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: usbnet.c,v 1.44 2022/01/29 21:37:07 riastradh Exp $    */
+/*     $NetBSD: usbnet.c,v 1.45 2022/03/03 05:46:50 riastradh Exp $    */
 
 /*
  * Copyright (c) 2019 Matthew R. Green
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: usbnet.c,v 1.44 2022/01/29 21:37:07 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: usbnet.c,v 1.45 2022/03/03 05:46:50 riastradh Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -1322,7 +1322,7 @@
 bool
 usbnet_isdying(struct usbnet *un)
 {
-       return un->un_pri == NULL || un->un_pri->unp_dying;
+       return un->un_pri->unp_dying;
 }