BUG_ON() hit in drivers/md/raid5.c

From: Kai Heng Feng
Date: Wed Dec 19 2018 - 03:46:41 EST

Hi Dan,

There are two different BUG_ON() incidents get recently reported on Launchpad [1].

The first one is BUG_ON(dev->written) in ops_run_biodrain().
The second one (comment #23) is BUG_ON(!test_bit(R5_UPTODATE, &dev->flags)) in handle_parity_checks5().

I am not familiar with raid 5 so I am not sure these BUG_ON() are expected to be hit.

[1] https://bugs.launchpad.net/bugs/1780628