From 6d45a276668bc7778cfd045ca36ce23c59e7a7f9 Mon Sep 17 00:00:00 2001
From: Clemens Ladisch <clemens@ladisch.de>
Date: Tue, 25 May 2010 09:01:46 +0200
Subject: [PATCH] --- yaml --- r: 198639 b: refs/heads/master c:
 b406e6103baa3da85950f22d3d46d21a8da654c5 h: refs/heads/master i:   198637:
 5f9e6ea4f77c4e85c40bf30a993f3e46cc88a9e6   198635:
 cab382b7f5f40c71aff2bd0e32b6d3fd381be08d   198631:
 e8bf308e5f89f017d3a4830d120a4ef9e9fe3f0d   198623:
 583e24bcc4277e5d280d3d7ecfb77afa81cb9968 v: v3

---
 [refs]                     | 2 +-
 trunk/sound/core/pcm_lib.c | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index bda601b98b8d..78c9823ff3ab 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 57c7ffc9414d79c8ec25800bbdbf8f801b2f148a
+refs/heads/master: b406e6103baa3da85950f22d3d46d21a8da654c5
diff --git a/trunk/sound/core/pcm_lib.c b/trunk/sound/core/pcm_lib.c
index 22aff180dd1f..e9d98be190c5 100644
--- a/trunk/sound/core/pcm_lib.c
+++ b/trunk/sound/core/pcm_lib.c
@@ -345,7 +345,9 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
 		new_hw_ptr = hw_base + pos;
 	}
       __delta:
-	delta = (new_hw_ptr - old_hw_ptr) % runtime->boundary;
+	delta = new_hw_ptr - old_hw_ptr;
+	if (delta < 0)
+		delta += runtime->boundary;
 	if (xrun_debug(substream, in_interrupt ?
 			XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) {
 		char name[16];