Re: [PATCH v2 1/1] s390x: css: report errors from ccw_dstream_read/write

[Cornelia Huck <cohuck@redhat.com>]

On Thu,  8 Apr 2021 18:32:09 +0200
Pierre Morel <pmorel@linux.ibm.com> wrote:

> ccw_dstream_read/write functions returned values are sometime
> not taking into account and reported back to the upper level
> of interpretation of CCW instructions.
> 
> It follows that accessing an invalid address does not trigger
> a subchannel status program check to the guest as it should.
> 
> Let's test the return values of ccw_dstream_write[_buf] and
> ccw_dstream_read[_buf] and report it to the caller.
> 
> Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
>  hw/char/terminal3270.c | 11 +++++--
>  hw/s390x/3270-ccw.c    |  5 +++-
>  hw/s390x/css.c         | 14 +++++----
>  hw/s390x/virtio-ccw.c  | 66 ++++++++++++++++++++++++++++++------------
>  4 files changed, 69 insertions(+), 27 deletions(-)

Thanks, queued to s390-fixes (with cc:stable added.)