Merge tag 'md/4.4-rc5-fixes' of git://neil.brown.name/md

[karo-tx-linux.git] / drivers / net / usb / cdc_mbim.c

diff --git a/drivers/net/usb/cdc_mbim.c b/drivers/net/usb/cdc_mbim.c
index bbde9884ab8ae7fb952cbf6583feff10c9ce1109..8973abdec9f6bee3d849d72c3cc4c18006332f53 100644 (file)
--- a/drivers/net/usb/cdc_mbim.c
+++ b/drivers/net/usb/cdc_mbim.c
@@ -158,7 +158,7 @@ static int cdc_mbim_bind(struct usbnet *dev, struct usb_interface *intf)
        if (!cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
                goto err;
 
-       ret = cdc_ncm_bind_common(dev, intf, data_altsetting, 0);
+       ret = cdc_ncm_bind_common(dev, intf, data_altsetting, dev->driver_info->data);
        if (ret)
                goto err;
 
@@ -582,6 +582,26 @@ static const struct driver_info cdc_mbim_info_zlp = {
        .tx_fixup = cdc_mbim_tx_fixup,
 };
 
+/* The spefication explicitly allows NDPs to be placed anywhere in the
+ * frame, but some devices fail unless the NDP is placed after the IP
+ * packets.  Using the CDC_NCM_FLAG_NDP_TO_END flags to force this
+ * behaviour.
+ *
+ * Note: The current implementation of this feature restricts each NTB
+ * to a single NDP, implying that multiplexed sessions cannot share an
+ * NTB. This might affect performace for multiplexed sessions.
+ */
+static const struct driver_info cdc_mbim_info_ndp_to_end = {
+       .description = "CDC MBIM",
+       .flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
+       .bind = cdc_mbim_bind,
+       .unbind = cdc_mbim_unbind,
+       .manage_power = cdc_mbim_manage_power,
+       .rx_fixup = cdc_mbim_rx_fixup,
+       .tx_fixup = cdc_mbim_tx_fixup,
+       .data = CDC_NCM_FLAG_NDP_TO_END,
+};
+
 static const struct usb_device_id mbim_devs[] = {
        /* This duplicate NCM entry is intentional. MBIM devices can
         * be disguised as NCM by default, and this is necessary to
@@ -597,6 +617,10 @@ static const struct usb_device_id mbim_devs[] = {
        { USB_VENDOR_AND_INTERFACE_INFO(0x0bdb, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
          .driver_info = (unsigned long)&cdc_mbim_info,
        },
+       /* Huawei E3372 fails unless NDP comes after the IP packets */
+       { USB_DEVICE_AND_INTERFACE_INFO(0x12d1, 0x157d, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
+         .driver_info = (unsigned long)&cdc_mbim_info_ndp_to_end,
+       },
        /* default entry */
        { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
          .driver_info = (unsigned long)&cdc_mbim_info_zlp,