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

[Mikulas Patocka]

On Fri, 12 Jun 2020, Huaisheng Ye wrote:

> From: Huaisheng Ye <yehs1 at lenovo.com>
> 
> When uncommitted entry has been discarded, correct wc->uncommitted_block
> for getting the exact number.
> 
> Signed-off-by: Huaisheng Ye <yehs1 at lenovo.com>

Acked-by: Mikulas Patocka <mpatocka at redhat.com>

Also, add:
Cc: stable at vger.kernel.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 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
>