Fix some trivial bugs

Jianpeng Ma (3):
bcache: For back device, stripe_size get the small value between 1 <<
31 and the io_opt of request_queue of back device.
bcache: Avoid hung task happen.
bcache: Fix the bug about cal nr_stripes of backed device.

 drivers/md/bcache/super.c     |    8 ++++++--
 drivers/md/bcache/writeback.c |    2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

1.7.10.4