S2io: Check for CARD_DOWN before handling traffic

diff -Nurp patch3/drivers/net/s2io.c patch4/drivers/net/s2io.c
@@ -2927,6 +2927,11 @@ static int s2io_poll(struct net_device *
 	int i;
 
 	atomic_inc(&nic->isr_cnt);
+	if (unlikely(atomic_read(&nic->card_state) == CARD_DOWN)) {
+		atomic_dec(&nic->isr_cnt);
+		return IRQ_NONE;
+	}
+
 	mac_control = &nic->mac_control;
 	config = &nic->config;
 

@@ -3062,12 +3067,6 @@ static void rx_intr_handler(struct ring_
 	struct RxD3* rxdp3;
 
 	spin_lock(&nic->rx_lock);
-	if (atomic_read(&nic->card_state) == CARD_DOWN) {
-		DBG_PRINT(INTR_DBG, "%s: %s going down for reset\n",
-			  __FUNCTION__, dev->name);
-		spin_unlock(&nic->rx_lock);
-		return;
-	}
 
 	get_info = ring_data->rx_curr_get_info;
 	get_block = get_info.block_index;

@@ -4404,6 +4403,10 @@ static irqreturn_t s2io_msix_ring_handle
 	struct s2io_nic *sp = ring->nic;
 
 	atomic_inc(&sp->isr_cnt);
+	if (unlikely(atomic_read(&sp->card_state) == CARD_DOWN)){
+		atomic_dec(&sp->isr_cnt);
+		return IRQ_HANDLED;
+	}
 
 	rx_intr_handler(ring);
 	s2io_chk_rx_buffers(sp, ring->ring_no);

@@ -4418,6 +4421,10 @@ static irqreturn_t s2io_msix_fifo_handle
 	struct s2io_nic *sp = fifo->nic;
 
 	atomic_inc(&sp->isr_cnt);
+	if (unlikely(atomic_read(&sp->card_state) == CARD_DOWN)){
+		atomic_dec(&sp->isr_cnt);
+		return IRQ_HANDLED;
+	}
 	tx_intr_handler(fifo);
 	atomic_dec(&sp->isr_cnt);
 	return IRQ_HANDLED;

@@ -4896,6 +4903,11 @@ static irqreturn_t s2io_isr(int irq, voi
 		return IRQ_NONE;
 
 	atomic_inc(&sp->isr_cnt);
+	if (unlikely(atomic_read(&sp->card_state) == CARD_DOWN)) {
+		atomic_dec(&sp->isr_cnt);
+		return IRQ_NONE;
+	}
+
 	mac_control = &sp->mac_control;
 	config = &sp->config;