NFSv4: Fix clearing of layout segments in layoutreturn

Make sure that we clear the layout segments in cases where we see a
fatal error, and also in the case where the layout is invalid.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/nfs4proc.c

@@ -9998,6 +9998,7 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 		fallthrough;
 	default:
 		task->tk_status = 0;
+		lrp->res.lrs_present = 0;
 		fallthrough;
 	case 0:
 		break;
@@ -10011,9 +10012,11 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 		task->tk_status = 0;
 		break;
 	case -NFS4ERR_DELAY:
-		if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
-			break;
-		goto out_restart;
+		if (nfs4_async_handle_error(task, server, NULL, NULL) ==
+		    -EAGAIN)
+			goto out_restart;
+		lrp->res.lrs_present = 0;
+		break;
 	}
 	return;
 out_restart:

fs/nfs/pnfs.c

@@ -1284,10 +1284,9 @@ void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
 	LIST_HEAD(freeme);
 
 	spin_lock(&inode->i_lock);
-	if (!pnfs_layout_is_valid(lo) ||
-	    !nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid))
+	if (!nfs4_stateid_match_other(&lo->plh_stateid, arg_stateid))
 		goto out_unlock;
-	if (stateid) {
+	if (stateid && pnfs_layout_is_valid(lo)) {
 		u32 seq = be32_to_cpu(arg_stateid->seqid);
 
 		pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq);