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since usb task add/remove is supposed to be callable in any usb 

context, make sure the lock is OK for such.  ie, not a sleeping lock.
fixes PR#47244.
This commit is contained in:
mrg 2012-11-27 04:54:58 +00:00
parent 083cec6ba5
commit b136469b73
1 changed files with 7 additions and 3 deletions
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10
sys/dev/usb/usb.c
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@ -1,4 +1,4 @@
/* $NetBSD: usb.c,v 1.135 2012/07/20 23:18:02 mrg Exp $ */
/* $NetBSD: usb.c,v 1.136 2012/11/27 04:54:58 mrg Exp $ */
/*
* Copyright (c) 1998, 2002, 2008, 2012 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.135 2012/07/20 23:18:02 mrg Exp $");
__KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.136 2012/11/27 04:54:58 mrg Exp $");
#include "opt_compat_netbsd.h"
#include "opt_usb.h"
@ -224,7 +224,11 @@ usb_once_init(void)
taskq = &usb_taskq[i];
TAILQ_INIT(&taskq->tasks);
mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_NONE);
/*
* Since USB tasks are callable from any context, we have to
* make this lock a spinlock.
*/
mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB);
cv_init(&taskq->cv, "usbtsk");
taskq->name = taskq_names[i];
if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL,