---

yaml
---
r: 104280
b: refs/heads/master
c: d702745
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7e93a89251d4ed7bd4475db62616ccd03ddfd01a
+refs/heads/master: d7027458d68b2f1752a28016dcf2ffd0a7e8f567

trunk/Documentation/md.txt

@@ -347,7 +347,7 @@ Each directory contains:
         for storage of data.  This will normally be the same as the
 	component_size.  This can be written while assembling an
         array.  If a value less than the current component_size is
-        written, component_size will be reduced to this value.
+        written, it will be rejected.
 
 
 An active md device will also contain and entry for each active device

trunk/drivers/md/md.c

@@ -2101,29 +2101,30 @@ static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2)
 static ssize_t
 rdev_size_store(mdk_rdev_t *rdev, const char *buf, size_t len)
 {
-	char *e;
-	unsigned long long size = simple_strtoull(buf, &e, 10);
+	unsigned long long size;
 	unsigned long long oldsize = rdev->size;
 	mddev_t *my_mddev = rdev->mddev;
 
-	if (e==buf || (*e && *e != '\n'))
+	if (strict_strtoull(buf, 10, &size) < 0)
+		return -EINVAL;
+	if (size < my_mddev->size)
 		return -EINVAL;
 	if (my_mddev->pers && rdev->raid_disk >= 0) {
-		if (rdev->mddev->persistent) {
-			size = super_types[rdev->mddev->major_version].
+		if (my_mddev->persistent) {
+			size = super_types[my_mddev->major_version].
 				rdev_size_change(rdev, size);
 			if (!size)
 				return -EBUSY;
 		} else if (!size) {
 			size = (rdev->bdev->bd_inode->i_size >> 10);
 			size -= rdev->data_offset/2;
 		}
-		if (size < rdev->mddev->size)
+		if (size < my_mddev->size)
 			return -EINVAL; /* component must fit device */
 	}
 
 	rdev->size = size;
-	if (size > oldsize && rdev->mddev->external) {
+	if (size > oldsize && my_mddev->external) {
 		/* need to check that all other rdevs with the same ->bdev
 		 * do not overlap.  We need to unlock the mddev to avoid
 		 * a deadlock.  We have already changed rdev->size, and if
@@ -2165,8 +2166,6 @@ rdev_size_store(mdk_rdev_t *rdev, const char *buf, size_t len)
 			return -EBUSY;
 		}
 	}
-	if (size < my_mddev->size || my_mddev->size == 0)
-		my_mddev->size = size;
 	return len;
 }