tree 7162438bb121f9e4c101425d36c246ce3cb5e935
parent 8001e87d0ee98787c46f14f5f4f97aced70f119f
author Joe Thornber <ejt@redhat.com> 1416837916 +0000
committer Mike Snitzer <snitzer@redhat.com> 1417451409 -0500

dm cache: fix some issues with the new discard range support

Commit 7ae34e777 ("dm cache: improve discard support") needed to also:
- discontinue having DM core split the discard bios on cache block
  boundaries
- calculate the cache's discard_nr_blocks relative to the determined
  discard_block_size rather than using oblock_to_dblock()

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>