iwlwifi: pcie: use don't disable interrupt when irq_lock is taken

Since we don't take this lock in the primary interrupt
handler, there is no pointin disabling the interrupt
in the critical section protected by trans_pcie->irq_lock.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 12 insertions, 16 deletions

diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index 2e11512ca353..7ab510e4be41 100644
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -379,13 +379,12 @@ static void iwl_pcie_rxq_free_rbs(struct iwl_trans *trans)
 static void iwl_pcie_rx_replenish(struct iwl_trans *trans)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	unsigned long flags;
 
 	iwl_pcie_rxq_alloc_rbs(trans, GFP_KERNEL);
 
-	spin_lock_irqsave(&trans_pcie->irq_lock, flags);
+	spin_lock(&trans_pcie->irq_lock);
 	iwl_pcie_rxq_restock(trans);
-	spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+	spin_unlock(&trans_pcie->irq_lock);
 }
 
 static void iwl_pcie_rx_replenish_now(struct iwl_trans *trans)
@@ -541,10 +540,10 @@ int iwl_pcie_rx_init(struct iwl_trans *trans)
 
 	iwl_pcie_rx_hw_init(trans, rxq);
 
-	spin_lock_irqsave(&trans_pcie->irq_lock, flags);
+	spin_lock(&trans_pcie->irq_lock);
 	rxq->need_update = 1;
 	iwl_pcie_rxq_inc_wr_ptr(trans, rxq);
-	spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+	spin_unlock(&trans_pcie->irq_lock);
 
 	return 0;
 }
@@ -895,12 +894,11 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id)
 	struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
 	u32 inta = 0;
 	u32 handled = 0;
-	unsigned long flags;
 	u32 i;
 
 	lock_map_acquire(&trans->sync_cmd_lockdep_map);
 
-	spin_lock_irqsave(&trans_pcie->irq_lock, flags);
+	spin_lock(&trans_pcie->irq_lock);
 
 	/* dram interrupt table not set yet,
 	 * use legacy interrupt.
@@ -937,7 +935,7 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id)
 		 */
 		if (test_bit(STATUS_INT_ENABLED, &trans->status))
 			iwl_enable_interrupts(trans);
-		spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+		spin_unlock(&trans_pcie->irq_lock);
 		lock_map_release(&trans->sync_cmd_lockdep_map);
 		return IRQ_NONE;
 	}
@@ -948,7 +946,7 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id)
 		 * already raised an interrupt.
 		 */
 		IWL_WARN(trans, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
-		spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+		spin_unlock(&trans_pcie->irq_lock);
 		goto out;
 	}
 
@@ -969,7 +967,7 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id)
 		IWL_DEBUG_ISR(trans, "inta 0x%08x, enabled 0x%08x\n",
 			      inta, iwl_read32(trans, CSR_INT_MASK));
 
-	spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+	spin_unlock(&trans_pcie->irq_lock);
 
 	/* Now service all interrupt bits discovered above. */
 	if (inta & CSR_INT_BIT_HW_ERR) {
@@ -1194,12 +1192,11 @@ void iwl_pcie_reset_ict(struct iwl_trans *trans)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 	u32 val;
-	unsigned long flags;
 
 	if (!trans_pcie->ict_tbl)
 		return;
 
-	spin_lock_irqsave(&trans_pcie->irq_lock, flags);
+	spin_lock(&trans_pcie->irq_lock);
 	iwl_disable_interrupts(trans);
 
 	memset(trans_pcie->ict_tbl, 0, ICT_SIZE);
@@ -1216,18 +1213,17 @@ void iwl_pcie_reset_ict(struct iwl_trans *trans)
 	trans_pcie->ict_index = 0;
 	iwl_write32(trans, CSR_INT, trans_pcie->inta_mask);
 	iwl_enable_interrupts(trans);
-	spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+	spin_unlock(&trans_pcie->irq_lock);
 }
 
 /* Device is going down disable ict interrupt usage */
 void iwl_pcie_disable_ict(struct iwl_trans *trans)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	unsigned long flags;
 
-	spin_lock_irqsave(&trans_pcie->irq_lock, flags);
+	spin_lock(&trans_pcie->irq_lock);
 	trans_pcie->use_ict = false;
-	spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
+	spin_unlock(&trans_pcie->irq_lock);
 }
 
 irqreturn_t iwl_pcie_isr(int irq, void *data)