From: Eric Van Hensbergen <ericvh@gmail.com>
Date: Thu, 14 Jul 2011 00:12:18 +0000 (-0500)
Subject: net/9p: fix client code to fail more gracefully on protocol error
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b85f7d92d7bd7e3298159e8b1eed8cb8cbbb0348;p=linux-beck.git

net/9p: fix client code to fail more gracefully on protocol error

There was a BUG_ON to protect against a bad id which could be dealt with
more gracefully.

Reported-by: Natalie Orlin <norlin@us.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
---

diff --git a/net/9p/client.c b/net/9p/client.c
index 9e3b0e640da1..81e667b6bbbd 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -280,7 +280,8 @@ struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag)
 	 * buffer to read the data into */
 	tag++;
 
-	BUG_ON(tag >= c->max_tag);
+	if(tag >= c->max_tag) 
+		return NULL;
 
 	row = tag / P9_ROW_MAXTAG;
 	col = tag % P9_ROW_MAXTAG;