From: Matt Joiner <anacrolix@gmail.com>
Date: Sat, 20 Feb 2016 16:33:39 +0000 (+1100)
Subject: Fix race updating piece priority when piece being read is unexpectedly unavailable
X-Git-Tag: v1.0.0~873
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=400fa1feaf151c2957621914f1df47391fe68027;p=btrtrc.git

Fix race updating piece priority when piece being read is unexpectedly unavailable
---

diff --git a/reader.go b/reader.go
index 12caf4ca..0f92343a 100644
--- a/reader.go
+++ b/reader.go
@@ -135,8 +135,10 @@ func (r *Reader) readOnceAt(b []byte, pos int64) (n int, err error) {
 			return
 		}
 		log.Printf("%s: error reading from torrent storage pos=%d: %s", r.t, pos, err)
+		r.t.cl.mu.Lock()
 		r.t.torrent.updatePieceCompletion(pi)
 		r.t.torrent.updatePiecePriority(pi)
+		r.t.cl.mu.Unlock()
 	}
 }