Re: [PATCH] mac80211: fix crash with single-queue drivers

[Larry Finger <Larry.Finger@lwfinger.net>]

On 07/04/2012 05:53 AM, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@intel.com>
>
> Larry (and some others I think) reported that with
> single-queue drivers mac80211 crashes when waking
> the queues. This happens because we allocate just
> a single queue for each virtual interface in case
> the driver doesn't have at least 4 queues, but the
> code stopping/waking the virtual interface queues
> wasn't taking this into account.
>
> Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
> ---
>   net/mac80211/util.c |   12 ++++++++++--
>   1 file changed, 10 insertions(+), 2 deletions(-)

Tested-by: Larry Finger <Larry.Finger@lwfinger.net>

This patch fixes the problem for drivers that always report a single queue such 
as at76c503-usb. There is still a problem for b43 with open-source firmware 
where the number of queues changes from 4 to 1. As that only affects b43, do you 
agree that the problem should be fixed there?

Larry