bool vnt_receive_frame(struct vnt_private *priv, struct vnt_rx_desc *curr_rd)
{
struct vnt_rd_info *rd_info = curr_rd->rd_info;
struct sk_buff *skb;
u16 frame_size;
skb = rd_info->skb;
dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
priv->rx_buf_sz, DMA_FROM_DEVICE);
frame_size = le16_to_cpu(curr_rd->rd1.req_count)
- le16_to_cpu(curr_rd->rd0.res_count);
if ((frame_size > 2364) || (frame_size < 33)) {
/* Frame Size error drop this packet.*/
dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size);
dev_kfree_skb_irq(skb);
return true;
}
if (vnt_rx_data(priv, skb, frame_size))
return true;
dev_kfree_skb_irq(skb);
return true;
}
bool vnt_receive_frame(struct vnt_private *priv, PSRxDesc curr_rd)
{
PDEVICE_RD_INFO rd_info = curr_rd->pRDInfo;
struct sk_buff *skb;
u16 frame_size;
skb = rd_info->skb;
dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
priv->rx_buf_sz, DMA_FROM_DEVICE);
frame_size = le16_to_cpu(curr_rd->m_rd1RD1.wReqCount)
- cpu_to_le16(curr_rd->m_rd0RD0.wResCount);
if ((frame_size > 2364) || (frame_size < 33)) {
/* Frame Size error drop this packet.*/
dev_dbg(&priv->pcid->dev, "Wrong frame size %d\n", frame_size);
dev_kfree_skb_irq(skb);
return true;
}
if (vnt_rx_data(priv, skb, frame_size))
return true;
dev_kfree_skb_irq(skb);
return true;
}
static void vnt_submit_rx_urb_complete(struct urb *urb)
{
struct vnt_rcb *rcb = urb->context;
struct vnt_private *priv = rcb->priv;
switch (urb->status) {
case 0:
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
return;
case -ETIMEDOUT:
default:
dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
break;
}
if (urb->actual_length) {
if (vnt_rx_data(priv, rcb, urb->actual_length)) {
rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
if (!rcb->skb) {
dev_dbg(&priv->usb->dev,
"Failed to re-alloc rx skb\n");
rcb->in_use = false;
return;
}
} else {
skb_push(rcb->skb, skb_headroom(rcb->skb));
skb_trim(rcb->skb, 0);
}
urb->transfer_buffer = skb_put(rcb->skb,
skb_tailroom(rcb->skb));
}
if (usb_submit_urb(urb, GFP_ATOMIC)) {
dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
rcb->in_use = false;
}
}