NFS: Return meaningful status from decode_secinfo()

When compiling, I was getting this warning:
fs/nfs/nfs4xdr.c: In function ‘decode_secinfo’:
fs/nfs/nfs4xdr.c:4839:6: warning: variable ‘status’ set but not used
[-Wunused-but-set-variable]

We were unconditionally returning 0 as long as there wasn't an error
coming out of xdr_inline_decode().  We probably want to check the error
status coming out of decode_op_hdr() and decode_secinfo_gss(), rather
than assuming that everything is OK all the time.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 7310d2e..c3ccd2c 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4836,6 +4836,8 @@ static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
        int i, num_flavors;
 
        status = decode_op_hdr(xdr, OP_SECINFO);
+       if (status)
+               goto out;
        p = xdr_inline_decode(xdr, 4);
        if (unlikely(!p))
                goto out_overflow;
@@ -4854,14 +4856,15 @@ static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
                sec_flavor->flavor = be32_to_cpup(p);
 
                if (sec_flavor->flavor == RPC_AUTH_GSS) {
-                       if (decode_secinfo_gss(xdr, sec_flavor))
-                               break;
+                       status = decode_secinfo_gss(xdr, sec_flavor);
+                       if (status)
+                               goto out;
                }
                res->flavors->num_flavors++;
        }
 
-       return 0;
-
+out:
+       return status;
 out_overflow:
        print_overflow_msg(__func__, xdr);
        return -EIO;