[Xen-changelog] [xen-unstable] [IA64] fix xencomm_handle_is_null().

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 3713ea43e6364bf2989a1cf0dc252a6a1393ce02
# Parent  8533c59c5b40df0f6e6d03cbc8a74057dcbed5db
[IA64] fix xencomm_handle_is_null().

It checks only desc->address[0]. However xencomm_add_offset() may
sets XENCOMM_INVALID while there left consumable bytes.
In such a case xencomm_handle_is_null() returns true wrongly.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 xen/arch/ia64/xen/xencomm.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff -r 8533c59c5b40 -r 3713ea43e636 xen/arch/ia64/xen/xencomm.c
--- a/xen/arch/ia64/xen/xencomm.c       Fri Nov 10 11:14:36 2006 -0700
+++ b/xen/arch/ia64/xen/xencomm.c       Fri Nov 10 11:14:42 2006 -0700
@@ -382,6 +382,6 @@ xencomm_handle_is_null(
             return 1;
 
         desc = (struct xencomm_desc *)desc_addr;
-        return (desc->address[0] == XENCOMM_INVALID);
-    }
-}
+        return (desc->nr_addrs == 0);
+    }
+}

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