From 08390ba4c9709314bb37c26806e2520a96b790bb Mon Sep 17 00:00:00 2001
From: Xin LI <delphij@FreeBSD.org>
Date: Mon, 30 Aug 2010 21:33:33 +0000
Subject: [PATCH] Drain watchdog callouts before detaching.  This prevents a
 panic while unloading the kernel module.

Submitted by:	Tom Cough
---
 sys/dev/twa/tw_osl_freebsd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/dev/twa/tw_osl_freebsd.c b/sys/dev/twa/tw_osl_freebsd.c
index 5cb25bd9847..3b7b426a628 100644
--- a/sys/dev/twa/tw_osl_freebsd.c
+++ b/sys/dev/twa/tw_osl_freebsd.c
@@ -903,6 +903,10 @@ twa_shutdown(device_t dev)
 	/* Disconnect interrupts. */
 	error = twa_teardown_intr(sc);
 
+	/* Stop watchdog task. */
+	callout_drain(&(sc->watchdog_callout[0]));
+	callout_drain(&(sc->watchdog_callout[1]));
+
 	/* Disconnect from the controller. */
 	if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
 		tw_osli_printf(sc, "error = %d",