Am Montag, 15. September 2008 schrieb Johannes Berg:

On Mon, 2008-09-15 at 14:29 +0200, Helmut Schaa wrote:

quoted

Basic implementation of software background scanning functionality.

The patch basically enhances the scanning state machine by two further
states (SCAN_DEFER, SCAN_OPERATION). In state SCAN_DEFER the driver is advised
to switch back to the operating channel while SCAN_OPERATION tells the access
point about being back from power saving and restarts the tx queue. Just before
SCAN_SET_CHANNEL sets the next channel to scan it notifies the access point
about going to power save state and stops the tx queue.

However one (still unresolved) issue is that the code does not wait for the
appropriate ACK from the access point after notifying the new power state.

Any thoughts or comments?

This doesn't play well at all with hardware assisted scan as far as I
can tell.

Correct. The patch only adapts software scan code. The hardware assisted scan
is not touched at all but should also not be affected in an odd way.

Helmut