create another kthread to run xfer abort tasks. xfer abort tasks cannot

be run from the generic task kthread, because xfers that need to be
aborted block newly queued tasks from running (i.e. the xfer to be aborted
blocks the abort of that task).  as there are now three types of usb
tasks, add an argument to usb_init_task() and another member to struct
usb_task to specify the task type.

fixes boot hangs that are showing up because we now use usb tasks to
attach/detach usb devices.

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/dev/usb/ohci.c b/sys/dev/usb/ohci.c
index fa543d0fe29..5b1c1544ccd 100644
--- a/sys/dev/usb/ohci.c
+++ b/sys/dev/usb/ohci.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ohci.c,v 1.99 2010/09/07 16:21:46 deraadt Exp $ */
+/*	$OpenBSD: ohci.c,v 1.100 2010/10/23 15:42:09 jakemsr Exp $ */
 /*	$NetBSD: ohci.c,v 1.139 2003/02/22 05:24:16 tsutsui Exp $	*/
 /*	$FreeBSD: src/sys/dev/usb/ohci.c,v 1.22 1999/11/17 22:33:40 n_hibma Exp $	*/
 
@@ -1894,7 +1894,8 @@ ohci_timeout(void *addr)
 	}
 
 	/* Execute the abort in a process context. */
-	usb_init_task(&oxfer->abort_task, ohci_timeout_task, addr);
+	usb_init_task(&oxfer->abort_task, ohci_timeout_task, addr,
+	    USB_TASK_TYPE_ABORT);
 	usb_add_task(oxfer->xfer.pipe->device, &oxfer->abort_task);
 }