net/9p/trans_fd.c: Fix unsigned return type

Author: Julia Lawall <>

The function has an unsigned return type, but returns a negative constant
to indicate an error condition.  The result of calling the function is
always stored in a variable of type (signed) int, and thus unsigned can be
dropped from the return type.

A sematic match that finds this problem is as follows:

identifier f;
constant C;

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }

Signed-off-by: Julia Lawall 
Signed-off-by: David S. Miller 
 net/9p/trans_fd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index c85109d..078eb16 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -222,7 +222,7 @@ static void p9_conn_cancel(struct p9_conn *m, int err)
-static unsigned int
+static int
 p9_fd_poll(struct p9_client *client, struct poll_table_struct *pt)
 	int ret, n;