[src/jmcneill-usbmp]: src/sys/dev/usb don't take the kernel lock when calling...

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

details:   https://anonhg.NetBSD.org/src/rev/5ed541b18880
branches:  jmcneill-usbmp
changeset: 771801:5ed541b18880
user:      mrg <mrg%NetBSD.org@localhost>
date:      Mon Feb 20 05:24:42 2012 +0000

description:
don't take the kernel lock when calling into the usb code anymore

diffstat:

 sys/dev/usb/umidi.c |  9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)

diffs (47 lines):

diff -r bbba73dcde85 -r 5ed541b18880 sys/dev/usb/umidi.c
--- a/sys/dev/usb/umidi.c       Mon Feb 20 05:09:36 2012 +0000
+++ b/sys/dev/usb/umidi.c       Mon Feb 20 05:24:42 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: umidi.c,v 1.53.2.3 2012/02/19 21:01:52 mrg Exp $       */
+/*     $NetBSD: umidi.c,v 1.53.2.4 2012/02/20 05:24:42 mrg Exp $       */
 /*
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: umidi.c,v 1.53.2.3 2012/02/19 21:01:52 mrg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: umidi.c,v 1.53.2.4 2012/02/20 05:24:42 mrg Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -363,10 +363,8 @@
 {
        struct umidi_mididev *mididev = addr;
 
-       /* XXX SMP */
        mididev->closing = 1;
 
-       KERNEL_LOCK(1, curlwp);
        mutex_spin_exit(&mididev->sc->sc_lock);
 
        if ((mididev->flags & FWRITE) && mididev->out_jack)
@@ -376,7 +374,6 @@
 
        /* XXX SMP */
        mutex_spin_enter(&mididev->sc->sc_lock);
-       KERNEL_UNLOCK_ONE(curlwp);
 
        mididev->opened = 0;
 }
@@ -1134,9 +1131,7 @@
        jack->u.in.intr = intr;
        jack->opened = 1;
        if (ep->num_open++ == 0 && UE_GET_DIR(ep->addr)==UE_DIR_IN) {
-               KERNEL_LOCK(1, curlwp);
                err = start_input_transfer(ep);
-               KERNEL_UNLOCK_ONE(curlwp);
                if (err != USBD_NORMAL_COMPLETION &&
                    err != USBD_IN_PROGRESS) {
                        ep->num_open--;