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iwlwifi: mvm: check if returned value is NULL

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While freeing inactive queue, check mvmsta to be valid before
dereferencing it.  Found by Klocwork.

Signed-off-by: Sharon Dvir <sharon.dvir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Sharon Dvir 2017-02-21 10:41:31 +02:00 committed by Luca Coelho
parent 8c5f47b15c
commit e3df1e4b51
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/intel/iwlwifi/mvm/sta.c
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@ -495,6 +495,8 @@ static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
spin_unlock_bh(&mvm->queue_info_lock);
mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
if (WARN_ON(!mvmsta))
return -EINVAL;
disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
/* Disable the queue */