K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2016-07-07T22:10:10.207777Z
K 7
svn:log
V 387
Fix ahci(4) driver attach to controller with 32 ports.

Incorrect sign expansion in variables that supposed to be a bit fields
caused infinite loop.  Fixing this allows system properly detect maximal
possible 32 devices configured on AHCI HBA of BHyVe.  That case did not
happen in a wild before due to lack of hardware AHCI HBAs with 32 ports.

Approved by:	re (gjb@)
MFC after:	1 week

END