Btrfs: loop waiting on writeback
lock_extent_buffer_for_io needs to loop around and make sure the
writeback bits are not set.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c1b898d..b71cc45 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3010,12 +3010,12 @@
flush_write_bio(epd);
flush = 1;
}
- wait_on_extent_buffer_writeback(eb);
- btrfs_tree_lock(eb);
- if (test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags)) {
- printk(KERN_ERR "Um, ok?\n");
+ while (1) {
+ wait_on_extent_buffer_writeback(eb);
+ btrfs_tree_lock(eb);
+ if (!test_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags))
+ break;
btrfs_tree_unlock(eb);
- return 0;
}
}