K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2021-12-10T12:32:24.064594Z
K 7
svn:log
V 468
twsi: protect interaction between twsi_transfer and twsi_intr

All accesses to softc are now done under a mutex to prevent data races
between the open context and the interrupt handler.
Additionally, the wait time in twsi_transfer is bounded now.
Previously we could get stuck there forever if an interrupt got lost.

(cherry picked from commit 69cfa60ddd4df814b507699f9bb7253ece054f40)

Git Hash:   4030ad30b2feb96bddbb2b6e6e94721bdf160f87
Git Author: avg@FreeBSD.org
END