[src/trunk]: src/sys/dev/tprof tprof_start: don't forget to restore refcount ...

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

details:   https://anonhg.NetBSD.org/src/rev/16870425969c
branches:  trunk
changeset: 762699:16870425969c
user:      yamt <yamt%NetBSD.org@localhost>
date:      Fri Feb 25 22:35:38 2011 +0000

description:
tprof_start: don't forget to restore refcount when failed to start backend.

diffstat:

 sys/dev/tprof/tprof.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r cd75d85cf25b -r 16870425969c sys/dev/tprof/tprof.c
--- a/sys/dev/tprof/tprof.c     Fri Feb 25 21:40:48 2011 +0000
+++ b/sys/dev/tprof/tprof.c     Fri Feb 25 22:35:38 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tprof.c,v 1.8 2011/02/05 14:04:40 yamt Exp $   */
+/*     $NetBSD: tprof.c,v 1.9 2011/02/25 22:35:38 yamt Exp $   */
 
 /*-
  * Copyright (c)2008,2009,2010 YAMAMOTO Takashi,
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tprof.c,v 1.8 2011/02/05 14:04:40 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tprof.c,v 1.9 2011/02/25 22:35:38 yamt Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -295,6 +295,8 @@
 
        error = tb->tb_ops->tbo_start(NULL);
        if (error != 0) {
+               KASSERT(tb->tb_usecount > 0);
+               tb->tb_usecount--;
                tprof_stop1();
                goto done;
        }