numa: clarify error message when node index is out of range in -numa dist, ...

When using following CLI:
  -numa dist,src=128,dst=1,val=20
user gets a rather confusing error message:
   "Invalid node 128, max possible could be 128"

Where 128 is number of nodes that QEMU supports (MAX_NODES),
while src/dst is an index up to that limit, so it should be
MAX_NODES - 1 in error message.
Make error message to explicitly state valid range for node
index to be more clear.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1526483174-169008-1-git-send-email-imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/numa.c b/numa.c
index aac22a9..efc78b2 100644
--- a/numa.c
+++ b/numa.c
@@ -141,9 +141,8 @@ static void parse_numa_distance(NumaDistOptions *dist, Error **errp)
     uint8_t val = dist->val;
 
     if (src >= MAX_NODES || dst >= MAX_NODES) {
-        error_setg(errp,
-                   "Invalid node %d, max possible could be %d",
-                   MAX(src, dst), MAX_NODES);
+        error_setg(errp, "Parameter '%s' expects an integer between 0 and %d",
+                   src >= MAX_NODES ? "src" : "dst", MAX_NODES - 1);
         return;
     }