From df5c82a8dcca1a5f23fefebae973d2dd0bf5aa11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vincent=20Stehl=C3=A9?= <vincent.stehle@intel.com>
Date: Fri, 15 Jul 2016 17:03:21 +0200
Subject: Btrfs: fix comparison in __btrfs_map_block()
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Add missing comparison to op in expression, which was forgotten when doing
the REQ_OP transition.

Fixes: b3d3fa519905 ("btrfs: update __btrfs_map_block for REQ_OP transition")
Signed-off-by: Vincent Stehlé <vincent.stehle@intel.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 14b2d19..4ff9c06 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5494,7 +5494,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int op,
 		}
 
 	} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
-		if (op == REQ_OP_WRITE || REQ_OP_DISCARD ||
+		if (op == REQ_OP_WRITE || op == REQ_OP_DISCARD ||
 		    op == REQ_GET_READ_MIRRORS) {
 			num_stripes = map->num_stripes;
 		} else if (mirror_num) {
-- 
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