usb: gadget: NCM: differentiate consumed packets from dropped packets
dev_kfree_skb_any() is used to free packets that are dropped by the network stack. Therefore the function should not be used for packets that have been successfully processed by the network stack. Instead dev_consume_skb_any() has to be used for such consumed packets. This separation helps to identify dropped packets. Signed-off-by: Torsten Polle <tpolle@de.adit-jv.com> Signed-off-by: Harish Jenny K N <harish_kandiga@mentor.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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@ -998,7 +998,7 @@ static struct sk_buff *package_for_tx(struct f_ncm *ncm)
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/* Merge the skbs */
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swap(skb2, ncm->skb_tx_data);
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if (ncm->skb_tx_data) {
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dev_kfree_skb_any(ncm->skb_tx_data);
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dev_consume_skb_any(ncm->skb_tx_data);
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ncm->skb_tx_data = NULL;
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}
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@ -1009,7 +1009,7 @@ static struct sk_buff *package_for_tx(struct f_ncm *ncm)
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/* Copy NTB across. */
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ntb_iter = (void *) skb_put(skb2, ncm->skb_tx_ndp->len);
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memcpy(ntb_iter, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
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dev_kfree_skb_any(ncm->skb_tx_ndp);
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dev_consume_skb_any(ncm->skb_tx_ndp);
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ncm->skb_tx_ndp = NULL;
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/* Insert zero'd datagram. */
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@ -1136,7 +1136,7 @@ static struct sk_buff *ncm_wrap_ntb(struct gether *port,
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memset(ntb_data, 0, dgram_pad);
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ntb_data = (void *) skb_put(ncm->skb_tx_data, skb->len);
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memcpy(ntb_data, skb->data, skb->len);
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dev_kfree_skb_any(skb);
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dev_consume_skb_any(skb);
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skb = NULL;
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} else if (ncm->skb_tx_data && ncm->timer_force_tx) {
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@ -1332,7 +1332,7 @@ static int ncm_unwrap_ntb(struct gether *port,
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} while (ndp_len > 2 * (opts->dgram_item_len * 2));
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} while (ndp_index);
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dev_kfree_skb_any(skb);
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dev_consume_skb_any(skb);
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VDBG(port->func.config->cdev,
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"Parsed NTB with %d frames\n", dgram_counter);
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@ -455,16 +455,17 @@ static void tx_complete(struct usb_ep *ep, struct usb_request *req)
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/* FALLTHROUGH */
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case -ECONNRESET: /* unlink */
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case -ESHUTDOWN: /* disconnect etc */
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dev_kfree_skb_any(skb);
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break;
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case 0:
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dev->net->stats.tx_bytes += skb->len;
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dev_consume_skb_any(skb);
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}
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dev->net->stats.tx_packets++;
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spin_lock(&dev->req_lock);
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list_add(&req->list, &dev->tx_reqs);
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spin_unlock(&dev->req_lock);
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dev_kfree_skb_any(skb);
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atomic_dec(&dev->tx_qlen);
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if (netif_carrier_ok(dev->net))
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