K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2012-08-19T02:16:22.736673Z
K 7
svn:log
V 719
When assembling the descriptor list, make sure that the "first" descriptor
is marked correctly.

The existing logic assumed that the first descriptor is i == 0, which
doesn't hold for EDMA TX.  In this instance, the first time filltxdesc()
is called can be up to i == 3.

So for a two-buffer descriptor:

* firstSeg is set to 0;
* lastSeg is set to 1;
* the ath_hal_filltxdesc() code will treat it as the last segment in
  a descriptor chain and blank some of the descriptor fields, causing
  the TX to stop.

When firstSeg is set to 1 (regardless of lastSeg), it overrides the
lastSeg setting.  Thus, ath_hal_filltxdesc() won't blank out these
fields.

Tested: AR9380, STA mode.  With this, association is successful.

END