1 files changed, 46 insertions, 43 deletions

diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 4b2caa6b7ac5..b83a9c9b6a97 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -577,41 +577,53 @@ static void ql_disable_interrupts(struct ql_adapter *qdev)
  * incremented everytime we queue a worker and decremented everytime
  * a worker finishes.  Once it hits zero we enable the interrupt.
  */
-void ql_enable_completion_interrupt(struct ql_adapter *qdev, u32 intr)
+u32 ql_enable_completion_interrupt(struct ql_adapter *qdev, u32 intr)
 {
-	if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags)))
+	u32 var = 0;
+	unsigned long hw_flags = 0;
+	struct intr_context *ctx = qdev->intr_context + intr;
+
+	if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags) && intr)) {
+		/* Always enable if we're MSIX multi interrupts and
+		 * it's not the default (zeroeth) interrupt.
+		 */
 		ql_write32(qdev, INTR_EN,
-			   qdev->intr_context[intr].intr_en_mask);
-	else {
-		if (qdev->legacy_check)
-			spin_lock(&qdev->legacy_lock);
-		if (atomic_dec_and_test(&qdev->intr_context[intr].irq_cnt)) {
-			QPRINTK(qdev, INTR, ERR, "Enabling interrupt %d.\n",
-				intr);
-			ql_write32(qdev, INTR_EN,
-				   qdev->intr_context[intr].intr_en_mask);
-		} else {
-			QPRINTK(qdev, INTR, ERR,
-				"Skip enable, other queue(s) are active.\n");
-		}
-		if (qdev->legacy_check)
-			spin_unlock(&qdev->legacy_lock);
+			   ctx->intr_en_mask);
+		var = ql_read32(qdev, STS);
+		return var;
 	}
+
+	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
+	if (atomic_dec_and_test(&ctx->irq_cnt)) {
+		ql_write32(qdev, INTR_EN,
+			   ctx->intr_en_mask);
+		var = ql_read32(qdev, STS);
+	}
+	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
+	return var;
 }
 
 static u32 ql_disable_completion_interrupt(struct ql_adapter *qdev, u32 intr)
 {
 	u32 var = 0;
+	unsigned long hw_flags;
+	struct intr_context *ctx;
 
-	if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags)))
-		goto exit;
-	else if (!atomic_read(&qdev->intr_context[intr].irq_cnt)) {
+	/* HW disables for us if we're MSIX multi interrupts and
+	 * it's not the default (zeroeth) interrupt.
+	 */
+	if (likely(test_bit(QL_MSIX_ENABLED, &qdev->flags) && intr))
+		return 0;
+
+	ctx = qdev->intr_context + intr;
+	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
+	if (!atomic_read(&ctx->irq_cnt)) {
 		ql_write32(qdev, INTR_EN,
-			   qdev->intr_context[intr].intr_dis_mask);
+		ctx->intr_dis_mask);
 		var = ql_read32(qdev, STS);
 	}
-	atomic_inc(&qdev->intr_context[intr].irq_cnt);
-exit:
+	atomic_inc(&ctx->irq_cnt);
+	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 	return var;
 }
 
@@ -623,7 +635,9 @@ static void ql_enable_all_completion_interrupts(struct ql_adapter *qdev)
 		 * and enables only if the result is zero.
 		 * So we precharge it here.
 		 */
-		atomic_set(&qdev->intr_context[i].irq_cnt, 1);
+		if (unlikely(!test_bit(QL_MSIX_ENABLED, &qdev->flags) ||
+			i == 0))
+			atomic_set(&qdev->intr_context[i].irq_cnt, 1);
 		ql_enable_completion_interrupt(qdev, i);
 	}
 
@@ -1725,19 +1739,6 @@ static irqreturn_t qlge_msix_rx_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/* We check here to see if we're already handling a legacy
- * interrupt.  If we are, then it must belong to another
- * chip with which we're sharing the interrupt line.
- */
-int ql_legacy_check(struct ql_adapter *qdev)
-{
-	int err;
-	spin_lock(&qdev->legacy_lock);
-	err = atomic_read(&qdev->intr_context[0].irq_cnt);
-	spin_unlock(&qdev->legacy_lock);
-	return err;
-}
-
 /* This handles a fatal error, MPI activity, and the default
  * rx_ring in an MSI-X multiple vector environment.
  * In MSI/Legacy environment it also process the rest of
@@ -1752,12 +1753,15 @@ static irqreturn_t qlge_isr(int irq, void *dev_id)
 	int i;
 	int work_done = 0;
 
-	if (qdev->legacy_check && qdev->legacy_check(qdev)) {
-		QPRINTK(qdev, INTR, INFO, "Already busy, not our interrupt.\n");
-		return IRQ_NONE;	/* Not our interrupt */
+	spin_lock(&qdev->hw_lock);
+	if (atomic_read(&qdev->intr_context[0].irq_cnt)) {
+		QPRINTK(qdev, INTR, DEBUG, "Shared Interrupt, Not ours!\n");
+		spin_unlock(&qdev->hw_lock);
+		return IRQ_NONE;
 	}
+	spin_unlock(&qdev->hw_lock);
 
-	var = ql_read32(qdev, STS);
+	var = ql_disable_completion_interrupt(qdev, intr_context->intr);
 
 	/*
 	 * Check for fatal error.
@@ -1823,6 +1827,7 @@ static irqreturn_t qlge_isr(int irq, void *dev_id)
 			}
 		}
 	}
+	ql_enable_completion_interrupt(qdev, intr_context->intr);
 	return work_done ? IRQ_HANDLED : IRQ_NONE;
 }
 
@@ -2701,8 +2706,6 @@ msi:
 		}
 	}
 	irq_type = LEG_IRQ;
-	spin_lock_init(&qdev->legacy_lock);
-	qdev->legacy_check = ql_legacy_check;
 	QPRINTK(qdev, IFUP, DEBUG, "Running with legacy interrupts.\n");
 }