dm-buffered: don't limit bc->start to ti->len >> 1

There is no need to restrict bc->start. bc->start is the offset on the
underlying partition, ti->len is the size of the table line containing the
target. These two values have no relationship, so there's no need to limit
bc->start to ti->len >> 1.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 drivers/md/dm-buffered-target.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/drivers/md/dm-buffered-target.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-buffered-target.c
+++ linux-2.6/drivers/md/dm-buffered-target.c
@@ -631,7 +631,7 @@ static int buffered_ctr(struct dm_target
 
 	/* Processs sector offset. */
 	arg = dm_shift_arg(&as);
-	r = (kstrtoull(arg, 10, (u64 *)&bc->start) || bc->start >= (ti->len >> 1)) ? -EINVAL : 0;
+	r = kstrtoull(arg, 10, (u64 *)&bc->start) ? -EINVAL : 0;
 	if (r) {
 		ti->error = "Invalid sector offset";
 		goto bad;