iwlwifi: mvm: fix SKB leak on invalid queue

commit b9f726c94224e863d4d3458dfec2e7e1284a39ce upstream.

It used to be the case that if we got here, we wouldn't warn
but instead allocate the queue (DQA). With using the mac80211
TXQs model this changed, and we really have nothing to do with
the frame here anymore, hence the warning now.

However, clearly we missed in coding & review that this is now
a pure error path and leaks the SKB if we return 0 instead of
an indication that the SKB needs to be freed. Fix this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes: cfbc6c4c5b91 ("iwlwifi: mvm: support mac80211 TXQs model")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index e3b2a2bf3863c335cfda28805e326efec69c0363..cd9f6c5918127b3f33a70b5db68b0e3bd6c97bc8 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1151,7 +1151,7 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
        if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
                iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
                spin_unlock(&mvmsta->lock);
-               return 0;
+               return -1;
        }
 
        if (!iwl_mvm_has_new_tx_api(mvm)) {