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mac80211: handle failed restart/resume better

Browse source 
When the driver fails during HW restart or resume, the whole
stack goes into a very confused state with interfaces being
up while the hardware is down etc.

Address this by shutting down everything; we'll run into a
lot of warnings in the process but that's better than having
the whole stack get messed up.

Reviewed-by: Arik Nemtsov <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Johannes Berg 2014-04-30 14:19:04 +02:00
commit f6837ba8c9
6 changed files with 153 additions and 51 deletions
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20
net/wireless/core.c
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@ -210,15 +210,12 @@ void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
}
}
static int cfg80211_rfkill_set_block(void *data, bool blocked)
void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
{
struct cfg80211_registered_device *rdev = data;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct wireless_dev *wdev;
if (!blocked)
return 0;
rtnl_lock();
ASSERT_RTNL();
list_for_each_entry(wdev, &rdev->wdev_list, list) {
if (wdev->netdev) {
@ -234,7 +231,18 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked)
break;
}
}
}
EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
static int cfg80211_rfkill_set_block(void *data, bool blocked)
{
struct cfg80211_registered_device *rdev = data;
if (!blocked)
return 0;
rtnl_lock();
cfg80211_shutdown_all_interfaces(&rdev->wiphy);
rtnl_unlock();
return 0;