[src/trunk]: src/sys/dev destroy the pool and the mutex when detaching.

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

details:   https://anonhg.NetBSD.org/src/rev/a8563e359749
branches:  trunk
changeset: 335236:a8563e359749
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Dec 30 20:57:37 2014 +0000

description:
destroy the pool and the mutex when detaching.

diffstat:

 sys/dev/ccd.c |  21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)

diffs (58 lines):

diff -r 17dab734f2d2 -r a8563e359749 sys/dev/ccd.c
--- a/sys/dev/ccd.c     Tue Dec 30 20:29:42 2014 +0000
+++ b/sys/dev/ccd.c     Tue Dec 30 20:57:37 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ccd.c,v 1.158 2014/12/30 20:29:42 christos Exp $       */
+/*     $NetBSD: ccd.c,v 1.159 2014/12/30 20:57:37 christos Exp $       */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 The NetBSD Foundation, Inc.
@@ -88,7 +88,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ccd.c,v 1.158 2014/12/30 20:29:42 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ccd.c,v 1.159 2014/12/30 20:57:37 christos Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_compat_netbsd.h"
@@ -161,6 +161,7 @@
 
 /* called by main() at boot time */
 void   ccdattach(int);
+void   ccddetach(void);
 
 /* called by biodone() at interrupt time */
 static void    ccdiodone(struct buf *);
@@ -299,6 +300,13 @@
            0, 0, "ccdbuf", NULL, IPL_BIO, NULL, NULL, NULL);
 }
 
+void
+ccddetach(void)
+{
+       pool_cache_destroy(ccd_cache);
+       mutex_destroy(&ccd_lock);
+}
+
 static int
 ccdinit(struct ccd_softc *cs, char **cpaths, struct vnode **vpp,
     struct lwp *l)
@@ -1716,11 +1724,14 @@
        case MODULE_CMD_FINI:
 #ifdef _MODULE
                mutex_enter(&ccd_lock);
-               if (ccd_nactive)
+               if (ccd_nactive) {
+                       mutex_exit(&ccd_lock);
                        error = EBUSY;
-               else
+               } else {
+                       mutex_exit(&ccd_lock);
                        error = devsw_detach(&ccd_bdevsw, &ccd_cdevsw);
-               mutex_exit(&ccd_lock);
+                       ccddetach();
+               }
 #endif
                break;