From: Huaisheng Ye yehs1@lenovo.com
commit 39495b12ef1cf602e6abd350dce2ef4199906531 upstream.
When uncommitted entry has been discarded, correct wc->uncommitted_block for getting the exact number.
Fixes: 48debafe4f2fe ("dm: add writecache target") Cc: stable@vger.kernel.org Signed-off-by: Huaisheng Ye yehs1@lenovo.com Acked-by: Mikulas Patocka mpatocka@redhat.com Signed-off-by: Mike Snitzer snitzer@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 613c171b1b6d2..856b3515654ff 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -857,6 +857,8 @@ static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_ writecache_wait_for_ios(wc, WRITE); discarded_something = true; } + if (!writecache_entry_is_committed(wc, e)) + wc->uncommitted_blocks--; writecache_free_entry(wc, e); }