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mac80211: don't call bss_info_changed on p2p-device/monitor 

Since the idle decision rework, mac80211 started calling
bss_info_changed() for the driver's monitor interface,
which causes a crash for iwlwifi, but drivers generally
don't expect this to happen. Therefore, avoid it.

While at it, also prevent calling it in such cases and
only print a warning. For the P2P Device interface the
idle will no longer be called (no channel context), so
also prevent that and warn on it.

Reported-by: Chaitanya <chaitanya.mgit@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-02-13 13:50:51 +01:00
parent 89afe614c0
commit 5bbe754d9e
2 changed files with 18 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/mac80211/chan.c
View File

@ -137,6 +137,9 @@ static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
ieee80211_recalc_txpower(sdata);
sdata->vif.bss_conf.idle = false;
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
sdata->vif.type != NL80211_IFTYPE_MONITOR)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
return 0;
@ -186,6 +189,9 @@ static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
sdata->vif.bss_conf.idle = true;
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
sdata->vif.type != NL80211_IFTYPE_MONITOR)
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
drv_unassign_vif_chanctx(local, sdata, ctx);

11
net/mac80211/driver-ops.h
View File

@ -207,13 +207,16 @@ static inline void drv_bss_info_changed(struct ieee80211_local *local,
{
might_sleep();
WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
BSS_CHANGED_BEACON_ENABLED) &&
sdata->vif.type != NL80211_IFTYPE_AP &&
sdata->vif.type != NL80211_IFTYPE_ADHOC &&
sdata->vif.type != NL80211_IFTYPE_MESH_POINT);
WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE &&
changed & ~BSS_CHANGED_IDLE);
sdata->vif.type != NL80211_IFTYPE_MESH_POINT))
return;
if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
sdata->vif.type == NL80211_IFTYPE_MONITOR))
return;
check_sdata_in_driver(sdata);