Re: dm writecache: correct uncommitted_block when discarding uncommitted entry

[Mike Snitzer]

On Sat, Jun 13 2020 at  8:40am -0400,
Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:

> 
> 
> On Fri, 12 Jun 2020, Huaisheng Ye wrote:
> 
> > From: Huaisheng Ye <yehs1@xxxxxxxxxx>
> > 
> > When uncommitted entry has been discarded, correct wc->uncommitted_block
> > for getting the exact number.
> > 
> > Signed-off-by: Huaisheng Ye <yehs1@xxxxxxxxxx>
> 
> Acked-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
> 
> Also, add:
> Cc: stable@xxxxxxxxxxxxxxx

I picked this up for 5.8 but I inverted the patch order because this
stable@ fix was dependent on the prior patch to skip waiting if in pmem
mode (due to locality of changes within same function).

See:
https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-5.8&id=39495b12ef1cf602e6abd350dce2ef4199906531

Mike