From 527d6c592aec1e3db5d6cd4205328b73f3047dd9 Mon Sep 17 00:00:00 2001
From: Aki Tuomi <aki.tuomi@dovecot.fi>
Date: Thu, 25 Aug 2016 12:26:55 +0300
Subject: [PATCH] dcrypt: Allow stream prefetch

We might get stream that has already been buffered, so we
must try read it in case buffer is full.
---
 src/lib-dcrypt/istream-decrypt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib-dcrypt/istream-decrypt.c b/src/lib-dcrypt/istream-decrypt.c
index c5807c2436..4f3ca12dfc 100644
--- a/src/lib-dcrypt/istream-decrypt.c
+++ b/src/lib-dcrypt/istream-decrypt.c
@@ -670,10 +670,12 @@ i_stream_decrypt_read(struct istream_private *stream)
 			stream->istream.eof = TRUE;
 			return -1;
 		}
+
 		/* need to read more input */
 		ret = i_stream_read(stream->parent);
-		if (ret == 0 || ret == -2)
+		if (ret == 0)
 			return ret;
+
 		data = i_stream_get_data(stream->parent, &size);
 
 		if (ret == -1 && (size == 0 || stream->parent->stream_errno != 0)) {