md: Free writes_pending in md_stop

dm raid calls md_stop to stop the raid device. It needs to
free the writes_pending here.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Xiao Ni 2023-01-21 09:48:10 +08:00 • committed by Song Liu
commit 07dbb13542