diff options
| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2012-04-18 08:01:15 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-04-23 14:56:12 -0400 |
| commit | 8db4c7e25d153fb049e81715d72fa3be3a0c3b69 (patch) | |
| tree | 9ea2cd4f36d525b5eaee150cce811b71a2d6ffa0 /drivers/net/wireless/iwlwifi/iwl-mac80211.c | |
| parent | 83722bd4aede80714f75bedc3cce9b6ea9baea7b (diff) | |
| download | lwn-8db4c7e25d153fb049e81715d72fa3be3a0c3b69.tar.gz lwn-8db4c7e25d153fb049e81715d72fa3be3a0c3b69.zip | |
iwlwifi: do not nulify ctx->vif on reset
ctx->vif is dereferenced in different part of iwlwifi code, so do not
nullify it.
This should address at least one of the possible reasons of WARNING at
iwlagn_mac_remove_interface, and perhaps some random crashes when
firmware reset is performed.
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-mac80211.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-mac80211.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-mac80211.c b/drivers/net/wireless/iwlwifi/iwl-mac80211.c index b6805f8e9a01..c24a7134a6f9 100644 --- a/drivers/net/wireless/iwlwifi/iwl-mac80211.c +++ b/drivers/net/wireless/iwlwifi/iwl-mac80211.c @@ -1244,6 +1244,7 @@ static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, struct iwl_rxon_context *tmp, *ctx = NULL; int err; enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); + bool reset = false; IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", viftype, vif->addr); @@ -1265,6 +1266,13 @@ static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, tmp->interface_modes | tmp->exclusive_interface_modes; if (tmp->vif) { + /* On reset we need to add the same interface again */ + if (tmp->vif == vif) { + reset = true; + ctx = tmp; + break; + } + /* check if this busy context is exclusive */ if (tmp->exclusive_interface_modes & BIT(tmp->vif->type)) { @@ -1291,7 +1299,7 @@ static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, ctx->vif = vif; err = iwl_setup_interface(priv, ctx); - if (!err) + if (!err || reset) goto out; ctx->vif = NULL; |