iwlwifi: pcie: clarify TX queue need_update handling

Similar to the recent RX queue patch, this changes the need_update
handling for the TX queues to be clearer and only done when needed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index 152c763..0937f84 100644
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -889,7 +889,6 @@
 	struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
 	u32 inta = 0;
 	u32 handled = 0;
-	u32 i;
 
 	lock_map_acquire(&trans->sync_cmd_lockdep_map);
 
@@ -1042,11 +1041,7 @@
 	if (inta & CSR_INT_BIT_WAKEUP) {
 		IWL_DEBUG_ISR(trans, "Wakeup interrupt\n");
 		iwl_pcie_rxq_check_wrptr(trans);
-		for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
-			spin_lock(&trans_pcie->txq[i].lock);
-			iwl_pcie_txq_inc_wr_ptr(trans, &trans_pcie->txq[i]);
-			spin_unlock(&trans_pcie->txq[i].lock);
-		}
+		iwl_pcie_txq_check_wrptrs(trans);
 
 		isr_stats->wakeup++;