[PATCH] dm writecache: correct uncommitted_block when discarding uncommitted entry

[Huaisheng Ye]

From: Huaisheng Ye <ye...@lenovo.com>

When uncommitted entry has been discarded, correct wc->uncommitted_block
for getting the exact number.

Signed-off-by: Huaisheng Ye <ye...@lenovo.com>
---
 drivers/md/dm-writecache.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 4367cc7..64b4527 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -855,6 +855,8 @@ static void writecache_discard(struct dm_writecache *wc, 
sector_t start, sector_
                                }
                                discarded_something = true;
                        }
+                       if (!writecache_entry_is_committed(wc, e))
+                               wc->uncommitted_blocks--;
                        writecache_free_entry(wc, e);
                }
 
-- 
1.8.3.1