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Commit 1eece799 authored by Subash Abhinov Kasiviswanathan's avatar Subash Abhinov Kasiviswanathan Committed by David S. Miller
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net: qualcomm: rmnet: Capture all drops in transmit path 



Packets in transmit path could potentially be dropped if there were
errors while adding the MAP header or the checksum header.
Increment the tx_drops stats in these cases.

Additionally, refactor the code to free the packet and increment
the tx_drops stat under a single label.

Signed-off-by: default avatarSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b0ec7585

drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c

+10 −11
Original line number Diff line number Diff line
@@ -148,7 +148,7 @@ static int rmnet_map_egress_handler(struct sk_buff *skb, 


	if (skb_headroom(skb) < required_headroom) {

		if (pskb_expand_head(skb, required_headroom, 0, GFP_KERNEL))

			goto fail;

			return -ENOMEM;

	}



	if (port->data_format & RMNET_FLAGS_EGRESS_MAP_CKSUMV4)
@@ -156,17 +156,13 @@ static int rmnet_map_egress_handler(struct sk_buff *skb, 


	map_header = rmnet_map_add_map_header(skb, additional_header_len, 0);

	if (!map_header)

		goto fail;

		return -ENOMEM;



	map_header->mux_id = mux_id;



	skb->protocol = htons(ETH_P_MAP);



	return 0;



fail:

	kfree_skb(skb);

	return -ENOMEM;

}



static void
@@ -228,15 +224,18 @@ void rmnet_egress_handler(struct sk_buff *skb) 
	mux_id = priv->mux_id;



	port = rmnet_get_port(skb->dev);

	if (!port) {

		kfree_skb(skb);

		return;

	}

	if (!port)

		goto drop;



	if (rmnet_map_egress_handler(skb, port, mux_id, orig_dev))

		return;

		goto drop;



	rmnet_vnd_tx_fixup(skb, orig_dev);



	dev_queue_xmit(skb);

	return;



drop:

	this_cpu_inc(priv->pcpu_stats->stats.tx_drops);

	kfree_skb(skb);

}