Gavin Atkinson bfcd23a946 iwm: If firmware load fails during init via iwm_preinit() we bail out
before calling ieee80211_ifattach() so the taskqueue hasn't been
initialized. Don't try to drain it, we'll panic.
Looks like this issue was introduced in r303326.

Reviewed by:	avos, sbruno, adrian
Differential Revision:	https://reviews.freebsd.org/D8499
2016-11-12 18:33:56 +00:00
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