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usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers

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Currently the usbnet core does not update the tx_packets statistic for
drivers with FLAG_MULTI_PACKET and there is no hook in the TX
completion path where they could do this.

cdc_ncm and dependent drivers are bumping tx_packets stat on the
transmit path while asix and sr9800 aren't updating it at all.

Add a packet count in struct skb_data so these drivers can fill it
in, initialise it to 1 for other drivers, and add the packet count
to the tx_packets statistic on completion.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings
2015-02-26 19:34:37 +00:00
committed by David S. Miller
parent 721a57a02d
commit 6588af614e
5 changed files with 20 additions and 3 deletions
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12
include/linux/usb/usbnet.h
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@@ -228,8 +228,20 @@ struct skb_data { /* skb->cb is one of these */
struct usbnet *dev;
enum skb_state state;
size_t length;
unsigned long packets;
};
/* Drivers that set FLAG_MULTI_PACKET must call this in their
* tx_fixup method before returning an skb.
*/
static inline void
usbnet_set_skb_tx_stats(struct sk_buff *skb, unsigned long packets)
{
struct skb_data *entry = (struct skb_data *) skb->cb;
entry->packets = packets;
}
extern int usbnet_open(struct net_device *net);
extern int usbnet_stop(struct net_device *net);
extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,