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mac80211: add post_channel_switch driver operation 

As a counterpart to the pre_channel_switch operation, add a
post_channel_switch operation.  This allows the drivers to go back to
a normal configuration after the channel switch is completed.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2014-10-08 09:48:38 +03:00 committed by Johannes Berg
parent 6d027bcc8a
commit f1d65583bc
5 changed files with 43 additions and 1 deletions
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6
include/net/mac80211.h
View File

@ -2836,6 +2836,9 @@ enum ieee80211_roc_type {
* before a channel switch procedure is started (ie. when a STA
* gets a CSA or an userspace initiated channel-switch), allowing
* the driver to prepare for the channel switch.
* @post_channel_switch: This is an optional callback that is called
* after a channel switch procedure is completed, allowing the
* driver to go back to a normal configuration.
*
* @join_ibss: Join an IBSS (on an IBSS interface); this is called after all
* information in bss_conf is set up and the beacon can be retrieved. A
@ -3046,6 +3049,9 @@ struct ieee80211_ops {
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *ch_switch);
int (*post_channel_switch)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
u32 (*get_expected_throughput)(struct ieee80211_sta *sta);

7
net/mac80211/cfg.c
View File

@ -2919,7 +2919,6 @@ static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
return err;
ieee80211_bss_info_change_notify(sdata, changed);
cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
@ -2927,6 +2926,12 @@ static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
sdata->csa_block_tx = false;
}
err = drv_post_channel_switch(sdata);
if (err)
return err;
cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
return 0;
}

16
net/mac80211/driver-ops.h
View File

@ -1214,6 +1214,22 @@ drv_pre_channel_switch(struct ieee80211_sub_if_data *sdata,
return ret;
}
static inline int
drv_post_channel_switch(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
int ret = 0;
if (!check_sdata_in_driver(sdata))
return -EIO;
trace_drv_post_channel_switch(local, sdata);
if (local->ops->post_channel_switch)
ret = local->ops->post_channel_switch(&local->hw, &sdata->vif);
trace_drv_return_int(local, ret);
return ret;
}
static inline int drv_join_ibss(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{

9
net/mac80211/mlme.c
View File

@ -1010,6 +1010,15 @@ static void ieee80211_chswitch_work(struct work_struct *work)
sdata->csa_block_tx = false;
}
ret = drv_post_channel_switch(sdata);
if (ret) {
sdata_info(sdata,
"driver post channel switch failed, disconnecting\n");
ieee80211_queue_work(&local->hw,
&ifmgd->csa_connection_drop_work);
goto out;
}
ieee80211_sta_reset_beacon_monitor(sdata);
ieee80211_sta_reset_conn_monitor(sdata);

6
net/mac80211/trace.h
View File

@ -2141,6 +2141,12 @@ TRACE_EVENT(drv_pre_channel_switch,
)
);
DEFINE_EVENT(local_sdata_evt, drv_post_channel_switch,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata),
TP_ARGS(local, sdata)
);
#ifdef CONFIG_MAC80211_MESSAGE_TRACING
#undef TRACE_SYSTEM