K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2015-05-16T05:59:25.889576Z
K 7
svn:log
V 501
Various iwn(4) fixes.

* simplify channel logic for determining RF gain setting in scan setup
* don't set TX timer on error
* free node references for unsent frames on device stop
* set maxfrags to IWN_MAX_SCATTER-1 (first segment is used by TX command)
* add missing IWN_UNLOCK() from interrupt path when the hardware
  disappears.
* pass control frames to host
* nitems() instead of local macro

Tested:

* Intel 5100, STA mode

PR:		kern/196264
Submitted by:	Andriy Voskoboinyk <s3erios@gmail.com>

END