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>

1 files changed, 5 insertions, 5 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c1b898d590d..b71cc4547d4 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3010,12 +3010,12 @@ static int lock_extent_buffer_for_io(struct extent_buffer *eb,
                         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;
                 }
         }