On Fri, 2013-09-13 at 16:36 -0700, Chun-Yeow Yeoh wrote:
> Finalizing the requried procedures for channel switching completion and
typo: required
> also adding the function for updating the beacon and probe response frames
> with CSA and MCSP elements. Once the channel switching is completed, the
> CSA and MCSP elements are removed from the beacon or probe response frames
> as defined in the IEEE Std 802.11-2012 section 10.9.8.4.3.
I'd prefer you rewrote this to be more active ... this seems rather
observer style :)
> +int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
> +{
> + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
> + int ret = 0;
> +
> + /* Remove the CSA and MCSP elements from the beacon */
> + kfree(ifmsh->csa_settings);
> + ifmsh->csa_settings = NULL;
> + ret = ieee80211_mesh_rebuild_beacon(sdata);
> + if (ret)
> + return -EINVAL;
This seems totally racy with what I pointed out in the other patch ...
> + /* Reset the TTL value and Initiator flag */
> + ifmsh->chsw_init = false;
> + ifmsh->chsw_ttl = 0;
> +
> + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
> +
> + mcsa_dbg(sdata, "complete switching to center freq %d MHz",
> + sdata->vif.bss_conf.chandef.chan->center_freq);
> + return ret;
return 0
> + tmp_csa_settings = kmalloc(sizeof(struct cfg80211_csa_settings),
> + GFP_ATOMIC);
> + if (!tmp_csa_settings) {
> + mcsa_dbg(sdata, "could not allocate memory for csa beaconing");
You should never print a message for memory allocation failures, they
already give very verbose output.
> + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
> + return ret;
return 0
johannes
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