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net: bcmgenet: Be drop monitor friendly while re-allocating headroom

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During bcmgenet_put_tx_csum() make sure we differentiate a SKB
headroom re-allocation failure from the normal swap and replace
path.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Doug Berger 2019-12-17 16:51:14 -08:00 committed by David S. Miller
parent ae895c4990
commit e3fa85883d
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/broadcom/genet/bcmgenet.c
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@ -1499,11 +1499,12 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
* enough headroom for us to insert 64B status block.
*/
new_skb = skb_realloc_headroom(skb, sizeof(*status));
dev_kfree_skb(skb);
if (!new_skb) {
dev_kfree_skb_any(skb);
dev->stats.tx_dropped++;
return NULL;
}
dev_consume_skb_any(skb);
skb = new_skb;
}