From 1503140d3ec2be9b917d2f8f7c64cb77b79a215b Mon Sep 17 00:00:00 2001
From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Thu, 16 Jun 2011 14:37:03 +0200
Subject: [PATCH] btrfs: Do not use bio->bi_bdev after submission

The block layer modifies bio->bi_bdev and bio->bi_sector while working on
the bio, they do _not_ come back unmodified in the completion callback.

To call add_page, we need at least some bi_bdev set, which is why the code
was working, previously. With this patch, we use the latest_bdev from
fsinfo instead of the leftover in the bio. This gives us the possibility to
use the bi_bdev field for another purpose.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
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