---

yaml --- r: 319468 b: refs/heads/master c: 7acf027 h: refs/heads/master v: v3
git-mirror · Jul 27, 2012 · fd974af · fd974af
1 parent d9cfe67
commit fd974af
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Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 55f2b8bdb0c7387eb2dc645b9ecbe5d0faa6b54e
+refs/heads/master: 7acf0277cea0f2da89ffffcc9892bea23f618e63
diff --git a/trunk/drivers/md/dm.c b/trunk/drivers/md/dm.c
@@ -1215,7 +1215,10 @@ static int __clone_and_map_discard(struct clone_info *ci)
 		if (!ti->num_discard_requests)
 			return -EOPNOTSUPP;
 
-		len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti));
+		if (!ti->split_discard_requests)
+			len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti));
+		else
+			len = min(ci->sector_count, max_io_len(ci->sector, ti));
 
 		__issue_target_requests(ci, ti, ti->num_discard_requests, len);
 

diff --git a/trunk/include/linux/device-mapper.h b/trunk/include/linux/device-mapper.h
@@ -217,6 +217,12 @@ struct dm_target {
 	 */
 	unsigned discards_supported:1;
 
+	/*
+	 * Set if the target required discard request to be split
+	 * on max_io_len boundary.
+	 */
+	unsigned split_discard_requests:1;
+
 	/*
 	 * Set if this target does not return zeroes on discarded blocks.
 	 */