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git2svn
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V 27
2021-01-11T14:54:41.724502Z
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V 587
safexcel: Fix a race around unblocking of crypto ops

safexcel_ring_intr() could fail to observed that sc_blocked is set after
completing all outstanding ops for a ring, in which case blocked ops
would be deferred forever.

Request structures are managed by individual rings, so move the
"blocked" flag into the per-ring state block and use the ring lock to
synchronize with safexcel_process().  Remove sc_mtx since it is now
unused.

(cherry picked from commit 092cf8d63f9fb9153c677f5793135926edc101d7)

Git Hash:   e222e1ff890957ba6c62dfd2d2bf4cb22f87997a
Git Author: markj@FreeBSD.org
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