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iwlwifi: mvm: hold mutex when flushing in iwl_mvm_flush_no_vif()

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The iwl_mvm_flush_tx_path() function sends a synchronous command to
the firmware.  When doing that, we must hold the mutex.  The
iwl_mvm_flush_no_vif() function was mistakenly not holding the mutex.
Fix it.

Fixes: 6110d9e5bd ("iwlwifi: mvm: Flush non STA TX queues")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Luca Coelho 2017-10-24 22:04:15 +03:00
parent 06195639c6
commit 309c4848c0
1 changed files with 5 additions and 2 deletions
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7
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
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@ -4005,11 +4005,14 @@ static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
int i;
if (!iwl_mvm_has_new_tx_api(mvm)) {
if (drop)
if (drop) {
mutex_lock(&mvm->mutex);
iwl_mvm_flush_tx_path(mvm,
iwl_mvm_flushable_queues(mvm) & queues, 0);
else
mutex_unlock(&mvm->mutex);
} else {
iwl_trans_wait_tx_queues_empty(mvm->trans, queues);
}
return;
}