[PATCH net-next] qede - Add a statistic for a case where driver drops tx packet due to memory allocation failure.

[Michael Shteinbok]

skb_linearization can fail due to memory allocation failure.
In such a case, the driver will drop the packet. In such a case
The driver used to print an error message.
This patch replaces this error message by a dedicated statistic.

Signed-off-by: Michael Shteinbok <michael.shtein...@cavium.com>
Signed-off-by: Ariel Elior <ariel.el...@cavium.com>
---
 drivers/net/ethernet/qlogic/qede/qede.h         | 1 +
 drivers/net/ethernet/qlogic/qede/qede_ethtool.c | 1 +
 drivers/net/ethernet/qlogic/qede/qede_fp.c      | 4 ++--
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qede/qede.h 
b/drivers/net/ethernet/qlogic/qede/qede.h
index de98a97..5084dc9 100644
--- a/drivers/net/ethernet/qlogic/qede/qede.h
+++ b/drivers/net/ethernet/qlogic/qede/qede.h
@@ -377,6 +377,7 @@ struct qede_tx_queue {
 
        u64 xmit_pkts;
        u64 stopped_cnt;
+       u64 tx_mem_alloc_err;
 
        __le16 *hw_cons_ptr;
 
diff --git a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c 
b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
index 8cbbd62..16331c6 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c
@@ -73,6 +73,7 @@
 } qede_tqstats_arr[] = {
        QEDE_TQSTAT(xmit_pkts),
        QEDE_TQSTAT(stopped_cnt),
+       QEDE_TQSTAT(tx_mem_alloc_err),
 };
 
 #define QEDE_STAT_OFFSET(stat_name, type, base) \
diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c 
b/drivers/net/ethernet/qlogic/qede/qede_fp.c
index 1a78027..bdf816f 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_fp.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c
@@ -1466,8 +1466,8 @@ netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct 
net_device *ndev)
 #if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)
        if (qede_pkt_req_lin(skb, xmit_type)) {
                if (skb_linearize(skb)) {
-                       DP_NOTICE(edev,
-                                 "SKB linearization failed - silently dropping 
this SKB\n");
+                       txq->tx_mem_alloc_err++;
+
                        dev_kfree_skb_any(skb);
                        return NETDEV_TX_OK;
                }
-- 
1.8.3.1