From d2af4f6dc8cb72e183ddf08cb8f13a32e54b74dd Mon Sep 17 00:00:00 2001
From: Alasdair G Kergon <agk@redhat.com>
Date: Tue, 12 Jul 2005 15:53:05 -0700
Subject: [PATCH] --- yaml --- r: 4751 b: refs/heads/master c:
 d5e404c10a98fc2979643476851e9cbdb1944812 h: refs/heads/master i:   4749:
 57401ebdca51fa9c0f9dc6d024839bb614a82c5b   4747:
 2b8a4d65f5fb303768fe232763f94befc73c33b0   4743:
 21650cd41e66895735bff30a75e40da56ea5198a   4735:
 0dab57f216cc970b98bdf74adf1548898ce003e0 v: v3

---
 [refs]                      | 2 +-
 trunk/drivers/md/dm-snap.c  | 4 ++++
 trunk/drivers/md/dm-table.c | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index fdecfde3c06e..1dfed8f5094a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 93c534aefb906824d71ea779ed0c7f1573843f4e
+refs/heads/master: d5e404c10a98fc2979643476851e9cbdb1944812
diff --git a/trunk/drivers/md/dm-snap.c b/trunk/drivers/md/dm-snap.c
index 594d1f6b4789..ab54f99b7c3b 100644
--- a/trunk/drivers/md/dm-snap.c
+++ b/trunk/drivers/md/dm-snap.c
@@ -931,6 +931,10 @@ static int __origin_write(struct list_head *snapshots, struct bio *bio)
 		if (!snap->valid)
 			continue;
 
+		/* Nothing to do if writing beyond end of snapshot */
+		if (bio->bi_sector >= dm_table_get_size(snap->table))
+			continue;
+
 		down_write(&snap->lock);
 
 		/*
diff --git a/trunk/drivers/md/dm-table.c b/trunk/drivers/md/dm-table.c
index 18e9b9953fcd..a5a4c0ed8a14 100644
--- a/trunk/drivers/md/dm-table.c
+++ b/trunk/drivers/md/dm-table.c
@@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc);
 EXPORT_SYMBOL(dm_get_device);
 EXPORT_SYMBOL(dm_put_device);
 EXPORT_SYMBOL(dm_table_event);
+EXPORT_SYMBOL(dm_table_get_size);
 EXPORT_SYMBOL(dm_table_get_mode);
 EXPORT_SYMBOL(dm_table_put);
 EXPORT_SYMBOL(dm_table_get);