Re: [PATCH v7 10/10] s390/vfio_ccw: implement a crw lock

[Farhan Ali]

On 7/27/2026 12:22 PM, Eric Farman wrote:
> Unlike the channel_program struct, which covers synchronous I/O
> submissions and asynchronous interrupts, the CRW region relies
> exclusively on asynchronous events coming from hardware.
>
> Implement a lock to manage the list of those payloads, to ensure
> they are read cohesively.
>
> Fixes: 3f02cb2fd9d2 ("vfio-ccw: Wire up the CRW irq and CRW region")
> Cc:stable@xxxxxxxxxxxxxxx
> Cc: Farhan Ali<alifm@xxxxxxxxxxxxx>
> Reviewed-by: Matthew Rosato<mjrosato@xxxxxxxxxxxxx>
> Signed-off-by: Eric Farman<farman@xxxxxxxxxxxxx>
> ---
>   drivers/s390/cio/vfio_ccw_chp.c     | 26 ++++++++++++++++----------
>   drivers/s390/cio/vfio_ccw_drv.c     |  6 ++++++
>   drivers/s390/cio/vfio_ccw_ops.c     |  4 ++++
>   drivers/s390/cio/vfio_ccw_private.h |  4 ++++
>   4 files changed, 30 insertions(+), 10 deletions(-)

Reviewed-by: Farhan Ali<alifm@xxxxxxxxxxxxx>