On Wed, Jan 15, 2014 at 2:04 PM, Michal Kazior <michal.kazior@xxxxxxxxx> wrote:
> This implements a fairly simple multi-interface
> CSA. It doesn't support multiple channel
> contexts so it doesn't support multi-channel.
>
> Once a CSA is started other CSA requests are
> denied until the first one is completed. A single
> CSA may affect multiple interfaces. CSA can happen
> only if it all target CSA chandefs are compatible
> and it affects all interfaces are sharing a single
> channel context exclusively.
>
> A new worker is introduced: csa_complete_work
> which is used to account per-interface countdowns
> and issue the actual channel switch after last
> interface completes its CSA.
>
> Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
> ---
[...]
>
> +static int ieee80211_ap_beacon_presp_backup(struct ieee80211_sub_if_data *sdata)
> +{
> + struct beacon_data *beacon;
> + struct probe_resp *probe_resp;
> +
> + beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
> + if (beacon) {
> + sdata->u.ap.prev_beacon = kmemdup(beacon, sizeof(beacon) +
> + beacon->head_len +
> + beacon->tail_len, GFP_KERNEL);
> + if (!sdata->u.ap.prev_beacon)
> + return -ENOMEM;
> + }
> +
you must also update the pointers here...
Eliad.
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