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Commit f39a3c06 authored by Suraj Sumangala's avatar Suraj Sumangala Committed by Marcel Holtmann
Browse files

Bluetooth: Modified hci_recv_fragment() to use hci_reassembly helper 



Modified packet based reassembly function hci_recv_fragment() to use
hci_reassembly()

Signed-off-by: default avatarSuraj Sumangala <suraj@atheros.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 33e882a5

net/bluetooth/hci_core.c

+11 −74
Original line number Diff line number Diff line
@@ -1142,87 +1142,24 @@ static int hci_reassembly(struct hci_dev *hdev, int type, void *data, 
	return remain;

}



/* Receive packet type fragment */

#define __reassembly(hdev, type)  ((hdev)->reassembly[(type) - 1])



int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)

{

	if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)

		return -EILSEQ;



	while (count) {

		struct sk_buff *skb = __reassembly(hdev, type);

		struct { int expect; } *scb;

		int len = 0;



		if (!skb) {

			/* Start of the frame */



			switch (type) {

			case HCI_EVENT_PKT:

				if (count >= HCI_EVENT_HDR_SIZE) {

					struct hci_event_hdr *h = data;

					len = HCI_EVENT_HDR_SIZE + h->plen;

				} else

					return -EILSEQ;

				break;

	int rem = 0;



			case HCI_ACLDATA_PKT:

				if (count >= HCI_ACL_HDR_SIZE) {

					struct hci_acl_hdr *h = data;

					len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);

				} else

					return -EILSEQ;

				break;



			case HCI_SCODATA_PKT:

				if (count >= HCI_SCO_HDR_SIZE) {

					struct hci_sco_hdr *h = data;

					len = HCI_SCO_HDR_SIZE + h->dlen;

				} else

	if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)

		return -EILSEQ;

				break;

			}



			skb = bt_skb_alloc(len, GFP_ATOMIC);

			if (!skb) {

				BT_ERR("%s no memory for packet", hdev->name);

				return -ENOMEM;

			}



			skb->dev = (void *) hdev;

			bt_cb(skb)->pkt_type = type;



			__reassembly(hdev, type) = skb;



			scb = (void *) skb->cb;

			scb->expect = len;

		} else {

			/* Continuation */



			scb = (void *) skb->cb;

			len = scb->expect;

		}



		len = min(len, count);



		memcpy(skb_put(skb, len), data, len);



		scb->expect -= len;



		if (scb->expect == 0) {

			/* Complete frame */



			__reassembly(hdev, type) = NULL;



			bt_cb(skb)->pkt_type = type;

			hci_recv_frame(skb);

		}

	do {

		rem = hci_reassembly(hdev, type, data, count,

						type - 1, GFP_ATOMIC);

		if (rem < 0)

			return rem;



		count -= len; data += len;

	}

		data += (count - rem);

		count = rem;

	} while (count);



	return 0;

	return rem;

}

EXPORT_SYMBOL(hci_recv_fragment);