On 6/10/21 4:20 PM, Eric Farman wrote:
Hi Conny,

Per our offline discussion, here's a fix for the error when a guest
issues "dasdfmt -M quick". It basically reverts commit 334e76850bbb
("vfio/ccw: update sense data if a unit check is pending")
and modifies the check that builds sense data in the TSCH handler.

Should it includes a Fixes: tag then?


I opted to NOT disable PMCW.CSENSE, because doing so prevents
vfio-ccw devices from coming online at all (didn't pursue deep
enough to explain why). Turning it off in reaction to a unit
check (in this now-reverted codepath) works, but only because of
the corresponding PMCW.CSENSE check in the TSCH code.

I don't know if anything is needed for the (unaltered) ECW data
that commit b498484ed49a ("s390x/css: sense data endianness")
addressed for the copied sense_data bytes, but figure we can
use this as a starting point. Thoughts?

Eric Farman (1):
   vfio-ccw: Keep passthrough sense data intact

  hw/s390x/css.c | 3 ++-
  hw/vfio/ccw.c  | 6 ------
  2 files changed, 2 insertions(+), 7 deletions(-)



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