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authorJohannes Berg <johannes.berg@intel.com>2012-07-12 22:19:48 +0200
committerJohannes Berg <johannes.berg@intel.com>2012-07-13 16:16:11 +0200
commit4290cb4bf212112e3d6f860e25f000ca8a1ca6a4 (patch)
treeb6dda8955a4e199c318860ffa01dc9b2ea417905 /net/wireless
parentcfg80211/mac80211: re-add get_channel operation (diff)
downloadlinux-4290cb4bf212112e3d6f860e25f000ca8a1ca6a4.tar.xz
linux-4290cb4bf212112e3d6f860e25f000ca8a1ca6a4.zip
cfg80211: reduce monitor interface tracking
Revert commit b78e8ceac23655e1e06b30aa95ab11742d1ac7c0 ("cfg80211: track monitor channel") and remove the set_monitor_enabled() callback. Due to the tracking happening in NETDEV_PRE_UP, it had introduced bugs because the monitor interface callback would be called before the device was started. It looks like there's no way to fix this, and using NETDEV_PRE_UP is broken anyway (since there's no NETDEV_UP_FAIL), so remove all that code, track interfaces in NETDEV_UP and also stop tracking the monitor channel in cfg80211. This mostly reverts to before the tracking, except that we keep the interface count tracking so that setting the monitor channel can be rejected properly. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/chan.c9
-rw-r--r--net/wireless/core.c48
-rw-r--r--net/wireless/core.h3
3 files changed, 2 insertions, 58 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index a16cdffb24a9..d355f67d0cdd 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -82,7 +82,6 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type chantype)
{
struct ieee80211_channel *chan;
- int err;
if (!rdev->ops->set_monitor_channel)
return -EOPNOTSUPP;
@@ -93,13 +92,7 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
if (!chan)
return -EINVAL;
- err = rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
- if (!err) {
- rdev->monitor_channel = chan;
- rdev->monitor_channel_type = chantype;
- }
-
- return err;
+ return rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
}
void
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 0557bb159025..71b684b5a675 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -736,60 +736,14 @@ static struct device_type wiphy_type = {
.name = "wlan",
};
-static struct ieee80211_channel *
-cfg80211_get_any_chan(struct cfg80211_registered_device *rdev)
-{
- struct ieee80211_supported_band *sband;
- int i;
-
- for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
- sband = rdev->wiphy.bands[i];
- if (sband && sband->n_channels > 0)
- return &sband->channels[0];
- }
-
- return NULL;
-}
-
-static void cfg80211_init_mon_chan(struct cfg80211_registered_device *rdev)
-{
- struct ieee80211_channel *chan;
-
- chan = cfg80211_get_any_chan(rdev);
- if (WARN_ON(!chan))
- return;
-
- mutex_lock(&rdev->devlist_mtx);
- WARN_ON(cfg80211_set_monitor_channel(rdev, chan->center_freq,
- NL80211_CHAN_NO_HT));
- mutex_unlock(&rdev->devlist_mtx);
-}
-
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
enum nl80211_iftype iftype, int num)
{
- bool has_monitors_only_old = cfg80211_has_monitors_only(rdev);
- bool has_monitors_only_new;
-
ASSERT_RTNL();
rdev->num_running_ifaces += num;
if (iftype == NL80211_IFTYPE_MONITOR)
rdev->num_running_monitor_ifaces += num;
-
- has_monitors_only_new = cfg80211_has_monitors_only(rdev);
- if (has_monitors_only_new != has_monitors_only_old) {
- if (rdev->ops->set_monitor_enabled)
- rdev->ops->set_monitor_enabled(&rdev->wiphy,
- has_monitors_only_new);
-
- if (!has_monitors_only_new) {
- rdev->monitor_channel = NULL;
- rdev->monitor_channel_type = NL80211_CHAN_NO_HT;
- } else {
- cfg80211_init_mon_chan(rdev);
- }
- }
}
static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
@@ -912,6 +866,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
mutex_unlock(&rdev->devlist_mtx);
dev_put(dev);
}
+ cfg80211_update_iface_num(rdev, wdev->iftype, 1);
cfg80211_lock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
wdev_lock(wdev);
@@ -1006,7 +961,6 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
mutex_unlock(&rdev->devlist_mtx);
if (ret)
return notifier_from_errno(ret);
- cfg80211_update_iface_num(rdev, wdev->iftype, 1);
break;
}
diff --git a/net/wireless/core.h b/net/wireless/core.h
index bac97da751df..5206c6844fd7 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -61,9 +61,6 @@ struct cfg80211_registered_device {
int num_running_ifaces;
int num_running_monitor_ifaces;
- struct ieee80211_channel *monitor_channel;
- enum nl80211_channel_type monitor_channel_type;
-
/* BSSes/scanning */
spinlock_t bss_lock;
struct list_head bss_list;