# HG changeset patch
# User Binzi Cao - Sun Microsystems - Beijing China <Binzi.Cao@Sun.COM>
# Date 1246930910 -28800
# Node ID 5e116862436f244f5c28b9c947d8ee5cc1db7f59
# Parent  2643c1cd9e2a7c63b0d8d73e10bf9b0cccc82d5b
6848883 Machine hang after usb audio detach

diff -r 2643c1cd9e2a -r 5e116862436f usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c
--- a/usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c	Mon Jul 06 21:19:41 2009 -0400
+++ b/usr/src/uts/common/io/usb/clients/audio/usb_ac/usb_ac.c	Tue Jul 07 09:41:50 2009 +0800
@@ -4118,6 +4118,12 @@
 
 		mutex_enter(&uacp->usb_ac_mutex);
 
+		if (rv == ENODEV) {
+			USB_DPRINTF_L2(PRINT_MASK_ALL, uacp->usb_ac_log_handle,
+			    "Device is not availabe");
+			break;
+		}
+
 		if ((acp->acp_flags & ACP_ENABLED) && mp != NULL && rv == 0)
 			rv = usb_ac_read_msg(acp, mp);