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Bluetooth: bpa10x: Use h4_recv_buf helper for frame reassembly

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The manually coded frame reassembly is actually broken. The h4_recv_buf
helper from the UART driver is a perfect fit for frame reassembly for
this driver. So just export that function and use it here as well.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2015-10-08 03:06:53 +02:00 committed by Johan Hedberg
parent 881f7e86a1
commit 943cc59219
3 changed files with 29 additions and 109 deletions
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1
drivers/bluetooth/Kconfig
View file

@ -184,6 +184,7 @@ config BT_HCIBCM203X
config BT_HCIBPA10X
tristate "HCI BPA10x USB driver"
depends on USB
select BT_HCIUART_H4
help
Bluetooth HCI BPA10x USB driver.
This driver provides support for the Digianswer BPA 100/105 Bluetooth

136
drivers/bluetooth/bpa10x.c
View file

@ -35,7 +35,9 @@
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#define VERSION "0.10"
#include "hci_uart.h"
#define VERSION "0.11"
static const struct usb_device_id bpa10x_table[] = {
/* Tektronix BPA 100/105 (Digianswer) */
@ -56,112 +58,6 @@ struct bpa10x_data {
struct sk_buff *rx_skb[2];
};
#define HCI_VENDOR_HDR_SIZE 5
struct hci_vendor_hdr {
__u8 type;
__le16 snum;
__le16 dlen;
} __packed;
static int bpa10x_recv(struct hci_dev *hdev, int queue, void *buf, int count)
{
struct bpa10x_data *data = hci_get_drvdata(hdev);
BT_DBG("%s queue %d buffer %p count %d", hdev->name,
queue, buf, count);
if (queue < 0 || queue > 1)
return -EILSEQ;
hdev->stat.byte_rx += count;
while (count) {
struct sk_buff *skb = data->rx_skb[queue];
struct { __u8 type; int expect; } *scb;
int type, len = 0;
if (!skb) {
/* Start of the frame */
type = *((__u8 *) buf);
count--; buf++;
switch (type) {
case HCI_EVENT_PKT:
if (count >= HCI_EVENT_HDR_SIZE) {
struct hci_event_hdr *h = buf;
len = HCI_EVENT_HDR_SIZE + h->plen;
} else
return -EILSEQ;
break;
case HCI_ACLDATA_PKT:
if (count >= HCI_ACL_HDR_SIZE) {
struct hci_acl_hdr *h = buf;
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 = buf;
len = HCI_SCO_HDR_SIZE + h->dlen;
} else
return -EILSEQ;
break;
case HCI_VENDOR_PKT:
if (count >= HCI_VENDOR_HDR_SIZE) {
struct hci_vendor_hdr *h = buf;
len = HCI_VENDOR_HDR_SIZE +
__le16_to_cpu(h->dlen);
} else
return -EILSEQ;
break;
}
skb = bt_skb_alloc(len, GFP_ATOMIC);
if (!skb) {
BT_ERR("%s no memory for packet", hdev->name);
return -ENOMEM;
}
data->rx_skb[queue] = skb;
scb = (void *) skb->cb;
scb->type = type;
scb->expect = len;
} else {
/* Continuation */
scb = (void *) skb->cb;
len = scb->expect;
}
len = min(len, count);
memcpy(skb_put(skb, len), buf, len);
scb->expect -= len;
if (scb->expect == 0) {
/* Complete frame */
data->rx_skb[queue] = NULL;
bt_cb(skb)->pkt_type = scb->type;
hci_recv_frame(hdev, skb);
}
count -= len; buf += len;
}
return 0;
}
static void bpa10x_tx_complete(struct urb *urb)
{
struct sk_buff *skb = urb->context;
@ -184,6 +80,22 @@ static void bpa10x_tx_complete(struct urb *urb)
kfree_skb(skb);
}
#define HCI_VENDOR_HDR_SIZE 5
#define HCI_RECV_VENDOR \
.type = HCI_VENDOR_PKT, \
.hlen = HCI_VENDOR_HDR_SIZE, \
.loff = 3, \
.lsize = 2, \
.maxlen = HCI_MAX_FRAME_SIZE
static const struct h4_recv_pkt bpa10x_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = hci_recv_frame },
{ HCI_RECV_VENDOR, .recv = hci_recv_diag },
};
static void bpa10x_rx_complete(struct urb *urb)
{
struct hci_dev *hdev = urb->context;
@ -197,11 +109,17 @@ static void bpa10x_rx_complete(struct urb *urb)
return;
if (urb->status == 0) {
if (bpa10x_recv(hdev, usb_pipebulk(urb->pipe),
bool idx = usb_pipebulk(urb->pipe);
data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx],
urb->transfer_buffer,
urb->actual_length) < 0) {
urb->actual_length,
bpa10x_recv_pkts,
ARRAY_SIZE(bpa10x_recv_pkts));
if (IS_ERR(data->rx_skb[idx])) {
BT_ERR("%s corrupted event packet", hdev->name);
hdev->stat.err_rx++;
data->rx_skb[idx] = NULL;
}
}

1
drivers/bluetooth/hci_h4.c
View file

@ -266,3 +266,4 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
return skb;
}
EXPORT_SYMBOL_GPL(h4_recv_buf);