tree b753571eb581f0646343c8d78688aba1d7a32c7b
parent 76aa5e704c80fb7ca8bd3d05593d9a28298c92cd
author Michael Buesch <mb@bu3sch.de> 1258573985 +0100
committer John W. Linville <linville@tuxdriver.com> 1258582168 -0500

b43: Enforce DMA descriptor memory constraints

Enforce all device constraints on the descriptor memory region.

There are several constraints on the descriptor memory, as documented
in the specification. The current code does not enforce them and/or
incorrectly enforces them.

Those constraints are:
- The address limitations on 30/32bit engines, that also apply to
  the skbs.
- The 4k alignment requirement on 30/32bit engines.
- The 8k alignment requirement on 64bit engines.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>