net: systemport: suppress warnings on failed Rx SKB allocations

[ Upstream commit 3554e54a46125030c534820c297ed7f6c3907e24 ]

The driver is designed to drop Rx packets and reclaim the buffers
when an allocation fails, and the network interface needs to safely
handle this packet loss. Therefore, an allocation failure of Rx
SKBs is relatively benign.

However, the output of the warning message occurs with a high
scheduling priority that can cause excessive jitter/latency for
other high priority processing.

This commit suppresses the warning messages to prevent scheduling
problems while retaining the failure count in the statistics of
the network interface.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index ad86a186ddc5ff4922f4d3a3e70779e0793a7f34..4dfdb5a58025b46af87b85b92b03d0d54b3f6015 100644 (file)
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -666,7 +666,8 @@ static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
        dma_addr_t mapping;
 
        /* Allocate a new SKB for a new packet */
-       skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
+       skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
+                                GFP_ATOMIC | __GFP_NOWARN);
        if (!skb) {
                priv->mib.alloc_rx_buff_failed++;
                netif_err(priv, rx_err, ndev, "SKB alloc failed\n");