qlcnic: additional driver statistics

Added additional driver statistics to track errors in rcv/tx path.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/qlcnic/qlcnic_init.c b/drivers/net/qlcnic/qlcnic_init.c
index 01ce74ee99f9..9ef9f58f84dd 100644
--- a/drivers/net/qlcnic/qlcnic_init.c
+++ b/drivers/net/qlcnic/qlcnic_init.c
@@ -1287,6 +1287,7 @@ qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
                         rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 
         if (pci_dma_mapping_error(pdev, dma)) {
+                adapter->stats.rx_dma_map_error++;
                 dev_kfree_skb_any(skb);
                 buffer->skb = NULL;
                 return -ENOMEM;
@@ -1311,8 +1312,10 @@ static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
                         PCI_DMA_FROMDEVICE);
 
         skb = buffer->skb;
-        if (!skb)
+        if (!skb) {
+                adapter->stats.null_skb++;
                 goto no_skb;
+        }
 
         if (likely(adapter->rx_csum && cksum == STATUS_CKSUM_OK)) {
                 adapter->stats.csummed++;
@@ -1502,6 +1505,8 @@ qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
 
                 if (rxbuf)
                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
+                else
+                        adapter->stats.null_rxbuf++;
 
 skip:
                 for (; desc_cnt > 0; desc_cnt--) {