[src/trunk]: src/sys/external/bsd/drm2/linux Exit, don't reenter, the mutex.....

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

details:   https://anonhg.NetBSD.org/src/rev/91b2e1df1025
branches:  trunk
changeset: 363893:91b2e1df1025
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Aug 14 14:53:11 2018 +0000

description:
Exit, don't reenter, the mutex...!@#*@$!&.

>From mrg@.

XXX pullup-7
XXX pullup-8

diffstat:

 sys/external/bsd/drm2/linux/linux_writecomb.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 9f1b8c8c0fde -r 91b2e1df1025 sys/external/bsd/drm2/linux/linux_writecomb.c
--- a/sys/external/bsd/drm2/linux/linux_writecomb.c     Tue Aug 14 14:49:13 2018 +0000
+++ b/sys/external/bsd/drm2/linux/linux_writecomb.c     Tue Aug 14 14:53:11 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_writecomb.c,v 1.4 2015/10/17 21:06:42 jmcneill Exp $     */
+/*     $NetBSD: linux_writecomb.c,v 1.5 2018/08/14 14:53:11 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_writecomb.c,v 1.4 2015/10/17 21:06:42 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_writecomb.c,v 1.5 2018/08/14 14:53:11 riastradh Exp $");
 
 #if defined(__i386__) || defined(__x86_64__)
 #define HAS_MTRR 1
@@ -136,7 +136,7 @@
        mutex_spin_enter(&linux_writecomb.lock);
        mtrr = idr_find(&linux_writecomb.idr, id);
        idr_remove(&linux_writecomb.idr, id);
-       mutex_spin_enter(&linux_writecomb.lock);
+       mutex_spin_exit(&linux_writecomb.lock);
 
        if (mtrr != NULL) {
                mtrr->type = 0;