net/9p: Handle get_user_pages_fast return properly

Use proper data type to handle get_user_pages_fast error condition. Also
do not treat EFAULT error as fatal.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/client.c b/net/9p/client.c
index 7736774..a9aa2dd 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -614,7 +614,7 @@
 
 	err = c->trans_mod->request(c, req);
 	if (err < 0) {
-		if (err != -ERESTARTSYS)
+		if (err != -ERESTARTSYS && err != -EFAULT)
 			c->status = Disconnected;
 		goto reterr;
 	}