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changeset 9957:8769ec0debbf

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6782730 flushq panic-ed due to async_ttycommon.t_writeq is null from async_softint
author An Bui <An.Bui@Sun.COM>
date Tue, 23 Jun 2009 17:42:42 -0700
parents 1705cb23ec4b
children 108c82b6bad3
files usr/src/uts/sun4/io/su_driver.c
diffstat 1 files changed, 4 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/usr/src/uts/sun4/io/su_driver.c	Tue Jun 23 23:08:42 2009 +0100
+++ b/usr/src/uts/sun4/io/su_driver.c	Tue Jun 23 17:42:42 2009 -0700
@@ -23,7 +23,7 @@
 /*	  All Rights Reserved					*/
 
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -2155,7 +2155,9 @@
 				OUTB(MCR, (val & ~DTR));
 				flushflag = (async->async_flags &
 				    ASYNC_CLOSING) ? FLUSHALL : FLUSHDATA;
-				flushq(tp->t_writeq, flushflag);
+				if (tp->t_writeq != NULL) {
+					flushq(tp->t_writeq, flushflag);
+				}
 				if (async->async_xmitblk != NULL) {
 					freeb(async->async_xmitblk);
 					async->async_xmitblk = NULL;