diff options
| -rw-r--r-- | drivers/net/usb/asix.h | 2 | ||||
| -rw-r--r-- | drivers/net/usb/asix_common.c | 41 |
2 files changed, 22 insertions, 21 deletions
diff --git a/drivers/net/usb/asix.h b/drivers/net/usb/asix.h index 5d049d00c2d7..a2d3ea6efb20 100644 --- a/drivers/net/usb/asix.h +++ b/drivers/net/usb/asix.h @@ -168,7 +168,7 @@ struct asix_data { struct asix_rx_fixup_info { struct sk_buff *ax_skb; u32 header; - u16 size; + u16 remaining; bool split_head; }; diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c index 75d6f26729a3..2bd5bdda8c2e 100644 --- a/drivers/net/usb/asix_common.c +++ b/drivers/net/usb/asix_common.c @@ -54,12 +54,13 @@ int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, struct asix_rx_fixup_info *rx) { int offset = 0; + u16 size; while (offset + sizeof(u16) <= skb->len) { - u16 remaining = 0; + u16 copy_length; unsigned char *data; - if (!rx->size) { + if (!rx->remaining) { if ((skb->len - offset == sizeof(u16)) || rx->split_head) { if(!rx->split_head) { @@ -81,42 +82,42 @@ int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, offset += sizeof(u32); } - /* get the packet length */ - rx->size = (u16) (rx->header & 0x7ff); - if (rx->size != ((~rx->header >> 16) & 0x7ff)) { + /* take frame length from Data header 32-bit word */ + size = (u16)(rx->header & 0x7ff); + if (size != ((~rx->header >> 16) & 0x7ff)) { netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", rx->header, offset); - rx->size = 0; return 0; } - rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, - rx->size); + rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); if (!rx->ax_skb) return 0; + rx->remaining = size; } - if (rx->size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { + if (rx->remaining > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n", - rx->size); + rx->remaining); kfree_skb(rx->ax_skb); rx->ax_skb = NULL; - rx->size = 0U; - + rx->remaining = 0; return 0; } - if (rx->size > skb->len - offset) { - remaining = rx->size - (skb->len - offset); - rx->size = skb->len - offset; + if (rx->remaining > skb->len - offset) { + copy_length = skb->len - offset; + rx->remaining -= copy_length; + } else { + copy_length = rx->remaining; + rx->remaining = 0; } - data = skb_put(rx->ax_skb, rx->size); - memcpy(data, skb->data + offset, rx->size); - if (!remaining) + data = skb_put(rx->ax_skb, copy_length); + memcpy(data, skb->data + offset, copy_length); + if (!rx->remaining) usbnet_skb_return(dev, rx->ax_skb); - offset += (rx->size + 1) & 0xfffe; - rx->size = remaining; + offset += (copy_length + 1) & 0xfffe; } if (skb->len != offset) { |