From 01b452c8ca900c2b4384d6260a0cc5450a65c3d7 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Wed, 20 Feb 2008 10:34:51 +0100
Subject: [PATCH] --- yaml --- r: 86717 b: refs/heads/master c:
 02cf01aea5af7a4d1a38045712fe11bffcc206b0 h: refs/heads/master i:   86715:
 ee5d655397137097e97880c95c8b4502344bf879 v: v3

---
 [refs]            |  2 +-
 trunk/fs/splice.c | 12 ++++++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index dfd1979c9589..87db8102bfa4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5d87a052c7e5f245bbb3018721b4b0afe0afc252
+refs/heads/master: 02cf01aea5af7a4d1a38045712fe11bffcc206b0
diff --git a/trunk/fs/splice.c b/trunk/fs/splice.c
index 9b559ee711a8..0670c915cd35 100644
--- a/trunk/fs/splice.c
+++ b/trunk/fs/splice.c
@@ -1669,6 +1669,13 @@ static int link_pipe(struct pipe_inode_info *ipipe,
 		i++;
 	} while (len);
 
+	/*
+	 * return EAGAIN if we have the potential of some data in the
+	 * future, otherwise just return 0
+	 */
+	if (!ret && ipipe->waiting_writers && (flags & SPLICE_F_NONBLOCK))
+		ret = -EAGAIN;
+
 	inode_double_unlock(ipipe->inode, opipe->inode);
 
 	/*
@@ -1709,11 +1716,8 @@ static long do_tee(struct file *in, struct file *out, size_t len,
 		ret = link_ipipe_prep(ipipe, flags);
 		if (!ret) {
 			ret = link_opipe_prep(opipe, flags);
-			if (!ret) {
+			if (!ret)
 				ret = link_pipe(ipipe, opipe, len, flags);
-				if (!ret && (flags & SPLICE_F_NONBLOCK))
-					ret = -EAGAIN;
-			}
 		}
 	}