Bug#588196: b43: does not join multicast groups

[Michael Büsch <mb@bu3sch.de>]

On 07/14/2010 09:50 AM, Simon Richter wrote:
> Hi,
>
> On Tue, Jul 13, 2010 at 04:05:10PM +0200, Michael Büsch wrote:
>
> > So it is up to the upper layer to detect the failure. I don't think
> > it's possible to automatically detect such incidents for multicast
> > transmissions. So the mechanism fails here.
>
> Well, it is about *receiving* a multicast transmission

The same applies to receiving. The RX queue is also dropped on switch
from DMA to PIO.

> advertisement, sent to 33:33:00:00:00:01). I have no idea where the
> packet is dropped; from my somewhat limited understanding of 802.11, I'd
> expect the frames to be treated like broadcast frames by the AP, so it'd
> be the receiver dropping them in the MAC filter.

The actual switch from DMA to PIO mode completely reinitializes
the hardware and drops all queues.

--
Greetings Michael.