[src/trunk]: src/sys/dev/usb Fix inequality for refcnt drain: -1 here means a...

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

details:   https://anonhg.NetBSD.org/src/rev/b6ce01f06efc
branches:  trunk
changeset: 846865:b6ce01f06efc
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Dec 03 05:01:58 2019 +0000

description:
Fix inequality for refcnt drain: -1 here means all refs gone.

diffstat:

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

diffs (27 lines):

diff -r 961ba891e922 -r b6ce01f06efc sys/dev/usb/usbnet.c
--- a/sys/dev/usb/usbnet.c      Tue Dec 03 05:01:45 2019 +0000
+++ b/sys/dev/usb/usbnet.c      Tue Dec 03 05:01:58 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: usbnet.c,v 1.31 2019/12/03 05:01:45 riastradh Exp $    */
+/*     $NetBSD: usbnet.c,v 1.32 2019/12/03 05:01:58 riastradh Exp $    */
 
 /*
  * Copyright (c) 2019 Matthew R. Green
@@ -33,7 +33,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: usbnet.c,v 1.31 2019/12/03 05:01:45 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: usbnet.c,v 1.32 2019/12/03 05:01:58 riastradh Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -1519,7 +1519,7 @@
 
        mutex_enter(&unp->unp_lock);
        unp->unp_refcnt--;
-       while (unp->unp_refcnt > 0) {
+       while (unp->unp_refcnt >= 0) {
                /* Wait for processes to go away */
                cv_wait(&unp->unp_detachcv, &unp->unp_lock);
        }