Conny, As I mentioned offline, I have been encountering some problems while testing the channel path code. By pure coincidence, I found some really good clues that led me to this proposed fix. I moved this commit to the head of my channel path v2 code, but think maybe it should be sent by itself so it doesn't get lost in that noise. Figure 16-6 in SA22-7832-12 (POPS) goes into great detail of the contents of the irb.cpa based on the other bits in the IRB. Both the existing code and this new patch treates the irb.cpa as valid all the time, even though that table has many many entries where the cpa contents are "unpredictable." Methinks that this is partially how we got into this mess, so maybe I need to write some smarter logic here anyway? Thoughts? (Disclaimer1: I didn't go back and re-read the conversations that were had for the commit I marked in the "Fixes:" tag, but will just to make sure we didn't miss something.) (Disclaimer2: This makes my torturing-of-the-chpids test run quite nicely, but I didn't go back to try some of the other cruel-and-unusual tests at my disposable to ensure this patch doesn't cause any other regressions. That's on today's agenda.) Eric Farman (1): vfio-ccw: Don't free channel programs for unrelated interrupts drivers/s390/cio/vfio_ccw_cp.c | 11 +++++++++-- drivers/s390/cio/vfio_ccw_cp.h | 2 +- drivers/s390/cio/vfio_ccw_drv.c | 4 ++-- 3 files changed, 12 insertions(+), 5 deletions(-) -- 2.17.1
