From ca7aa695978909c4a9715c00dce6658aac26a1a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Wed, 2 Sep 2020 18:43:11 +0200
Subject: [PATCH] ffiwrapper: More correct error check on openPartialFile

---
 extern/sector-storage/ffiwrapper/sealer_cgo.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/extern/sector-storage/ffiwrapper/sealer_cgo.go b/extern/sector-storage/ffiwrapper/sealer_cgo.go
index c4e5511d1..d4f796dcb 100644
--- a/extern/sector-storage/ffiwrapper/sealer_cgo.go
+++ b/extern/sector-storage/ffiwrapper/sealer_cgo.go
@@ -372,6 +372,10 @@ func (sb *Sealer) ReadPiece(ctx context.Context, writer io.Writer, sector abi.Se
 
 	pf, err := openPartialFile(maxPieceSize, path.Unsealed)
 	if err != nil {
+		if xerrors.Is(err, os.ErrNotExist) {
+			return false, nil
+		}
+
 		return false, xerrors.Errorf("opening partial file: %w", err)
 	}