From 882895d4119992af2c9b654dbb3ac88cd17fa810 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 3 Nov 2011 12:17:49 -0400
Subject: [PATCH] Btrfs: fix raid10 reading math

The btrfs-progs raid10 code has been silently reading the wrong
raid10 block forever.  We didn't notice because it was always fixed
up by the retry code.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
 volumes.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/volumes.c b/volumes.c
index 03bfb8cc..4c29cefd 100644
--- a/volumes.c
+++ b/volumes.c
@@ -1170,8 +1170,6 @@ again:
 			multi->num_stripes = map->sub_stripes;
 		else if (mirror_num)
 			stripe_index += mirror_num - 1;
-		else
-			stripe_index = stripe_nr % map->sub_stripes;
 
 		stripe_nr = stripe_nr / factor;
 	} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {