btrfs: don't set force_bio_submit in read_extent_buffer_subpage

When read_extent_buffer_subpage calls submit_extent_page, it does
so on a freshly initialized btrfs_bio_ctrl structure that can't have
a valid bio to submit.  Clear the force_bio_submit parameter to false
as there is nothing to submit.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 408a5d8..c903a8d 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4449,7 +4449,7 @@ static int read_extent_buffer_subpage(struct extent_buffer *eb, int wait,
        btrfs_subpage_start_reader(fs_info, page, eb->start, eb->len);
        ret = submit_extent_page(REQ_OP_READ, NULL, &bio_ctrl,
                                 eb->start, page, eb->len,
-                                eb->start - page_offset(page), 0, true);
+                                eb->start - page_offset(page), 0, false);
        if (ret) {
                /*
                 * In the endio function, if we hit something wrong we will