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[knet] Address Tx drop No DMA resource issue (#5727)

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Signed-off-by: Neetha John <nejo@microsoft.com>
This commit is contained in:
Neetha John 2020-10-28 08:29:16 -07:00 committed by GitHub
parent 701a304b6d
commit 6b96b8e4ac
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1 changed files with 9 additions and 7 deletions
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16
platform/broadcom/saibcm-modules/systems/linux/kernel/modules/bcm-knet/bcm-knet.c
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@ -725,6 +725,12 @@ typedef struct bkn_filter_s {
} bkn_filter_t;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,29))
#define BKN_NETDEV_TX_BUSY NETDEV_TX_BUSY
#else
#define BKN_NETDEV_TX_BUSY 1
#endif
/*
* Multiple instance support in KNET
*/
@ -4840,15 +4846,11 @@ bkn_tx(struct sk_buff *skb, struct net_device *dev)
priv->stats.tx_bytes += pktlen;
sinfo->tx.pkts++;
} else {
DBG_WARN(("Tx drop: No DMA resources\n"));
priv->stats.tx_dropped++;
DBG_VERB(("Tx busy: No DMA resources\n"));
sinfo->tx.pkts_d_dma_resrc++;
dev_kfree_skb_any(skb);
}
/* Check our Tx resources */
if (sinfo->tx.free <= 1) {
bkn_suspend_tx(sinfo);
spin_unlock_irqrestore(&sinfo->lock, flags);
return BKN_NETDEV_TX_BUSY;
}
NETDEV_UPDATE_TRANS_START_TIME(dev);