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iwlwifi: mvm: fix theoretical NULL ptr dereference

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mvmsta could have been NULL / ERR.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Emmanuel Grumbach 2014-03-18 14:53:18 +02:00
parent 50df8a3065
commit f718c2df22
1 changed files with 5 additions and 0 deletions
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drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c
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@ -312,6 +312,11 @@ static ssize_t iwl_dbgfs_reduced_txp_write(struct ieee80211_vif *vif,
mutex_lock(&mvm->mutex);
mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
if (IS_ERR_OR_NULL(mvmsta)) {
mutex_unlock(&mvm->mutex);
return -ENOTCONN;
}
mvmsta->bt_reduced_txpower_dbg = false;
ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
reduced_tx_power);