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| author | David S. Miller <davem@davemloft.net> | 2016-05-19 22:56:48 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-19 22:56:48 -0700 |
| commit | 52103b70e13ae1381020b5a9fa15824a9b35baeb (patch) | |
| tree | ccb11cf37646839de86dec14c289bbb80c4882b4 /drivers/net | |
| parent | e22cb5e787623a98e22a2660041b455a2c138b02 (diff) | |
| download | linux-52103b70e13ae1381020b5a9fa15824a9b35baeb.tar.gz | |
Revert "net: pegasus: remove dead coding"
This reverts commit e00be9e4d0ffcc0121606229f0aa4b246d6881d7. It causes warnings and has several problems. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/usb/pegasus.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c index 1903d2e2b62d..36cd7f016a8d 100644 --- a/drivers/net/usb/pegasus.c +++ b/drivers/net/usb/pegasus.c @@ -470,8 +470,61 @@ static void read_bulk_callback(struct urb *urb) return; default: netif_dbg(pegasus, rx_err, net, "RX status %d\n", status); + goto goon; } + if (!count || count < 4) + goto goon; + + rx_status = buf[count - 2]; + if (rx_status & 0x1e) { + netif_dbg(pegasus, rx_err, net, + "RX packet error %x\n", rx_status); + pegasus->stats.rx_errors++; + if (rx_status & 0x06) /* long or runt */ + pegasus->stats.rx_length_errors++; + if (rx_status & 0x08) + pegasus->stats.rx_crc_errors++; + if (rx_status & 0x10) /* extra bits */ + pegasus->stats.rx_frame_errors++; + goto goon; + } + if (pegasus->chip == 0x8513) { + pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer); + pkt_len &= 0x0fff; + pegasus->rx_skb->data += 2; + } else { + pkt_len = buf[count - 3] << 8; + pkt_len += buf[count - 4]; + pkt_len &= 0xfff; + pkt_len -= 4; + } + + /* + * If the packet is unreasonably long, quietly drop it rather than + * kernel panicing by calling skb_put. + */ + if (pkt_len > PEGASUS_MTU) + goto goon; + + /* + * at this point we are sure pegasus->rx_skb != NULL + * so we go ahead and pass up the packet. + */ + skb_put(pegasus->rx_skb, pkt_len); + pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net); + netif_rx(pegasus->rx_skb); + pegasus->stats.rx_packets++; + pegasus->stats.rx_bytes += pkt_len; + + if (pegasus->flags & PEGASUS_UNPLUG) + return; + + pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU, + GFP_ATOMIC); + + if (pegasus->rx_skb == NULL) + goto tl_sched; goon: usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb, usb_rcvbulkpipe(pegasus->usb, 1), |