NFS: Don't print a pNFS error if we aren't using pNFS
We used to check for a valid layout type id before verifying pNFS flags
as an indicator for if we are using pNFS. This changed in
3bb7abd5ca
with the introduction of multiple layout types, since now we are passing
an array of ids instead of just one. Since then, users have been seeing
a KERN_ERR printk show up whenever mounting NFS v4 without pNFS. This
patch restores the original behavior of exiting set_pnfs_layoutdriver()
early if we aren't using pNFS.
Fixes
3bb7abd5ca ("pnfs: track multiple layout types in fsinfo
structure")
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>