b43: Enforce DMA descriptor memory constraints

Browse source

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>

...

This commit is contained in:

Michael Buesch 2009-11-18 20:53:05 +01:00 • committed by John W. Linville

parent 76aa5e704c

commit 9bd568a50c

2 changed files with 158 additions and 46 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

195

drivers/net/wireless/b43/dma.c

View file

7

drivers/net/wireless/b43/dma.h

View file