diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-03-29 06:29:37 -0700 |
|---|---|---|
| committer | Wey-Yi Guy <wey-yi.w.guy@intel.com> | 2011-04-08 07:59:53 -0700 |
| commit | a2b76b3b31568da9d281a393845f17689594ccdf (patch) | |
| tree | 1b9125faf168b6d4fe66c903e2606be331467013 /drivers | |
| parent | 68b993118f715cc631b62b6a50574e4701fe9ace (diff) | |
iwlwifi: fix bugs in change_interface
If change_interface gets invoked during a firmware
restart, it may crash; prevent that from happening
by checking if ctx->vif is assigned.
Additionally, in my initial commit I forgot to set
the vif->p2p variable correctly, so fix that too.
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-core.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index 5e7281c22c0..b5a06549b2a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -1775,6 +1775,15 @@ int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, mutex_lock(&priv->mutex); + if (!ctx->vif || !iwl_is_ready_rf(priv)) { + /* + * Huh? But wait ... this can maybe happen when + * we're in the middle of a firmware restart! + */ + err = -EBUSY; + goto out; + } + interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; if (!(interface_modes & BIT(newtype))) { @@ -1802,6 +1811,7 @@ int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, /* success */ iwl_teardown_interface(priv, vif, true); vif->type = newtype; + vif->p2p = newp2p; err = iwl_setup_interface(priv, ctx); WARN_ON(err); /* |