qlcnic: Fix panic while dumping TX queues on TX timeout

o In case of non-multi TX queue mode driver does not initialize "crb_intr_mask" pointer
  and driver was accessing that un-initialized pointer while dumping TX queue.
  So dump "crb_intr_mask" only when it is initilaized.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index 0bc9148..be78951 100644 (file)
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
@@ -2943,9 +2943,13 @@ static void qlcnic_dump_tx_rings(struct qlcnic_adapter *adapter)
                            tx_ring->tx_stats.xmit_called,
                            tx_ring->tx_stats.xmit_on,
                            tx_ring->tx_stats.xmit_off);
+
+               if (tx_ring->crb_intr_mask)
+                       netdev_info(netdev, "crb_intr_mask=%d\n",
+                                   readl(tx_ring->crb_intr_mask));
+
                netdev_info(netdev,
-                           "crb_intr_mask=%d, hw_producer=%d, sw_producer=%d sw_consumer=%d, hw_consumer=%d\n",
-                           readl(tx_ring->crb_intr_mask),
+                           "hw_producer=%d, sw_producer=%d sw_consumer=%d, hw_consumer=%d\n",
                            readl(tx_ring->crb_cmd_producer),
                            tx_ring->producer, tx_ring->sw_consumer,
                            le32_to_cpu(*(tx_ring->hw_consumer)));