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Commit 77b0a099 authored by Oliver Neukum's avatar Oliver Neukum Committed by David S. Miller
Browse files

cdc-ncm: use common parser 



This moves cdc-ncm to the common parser for CDC user
to reduce code duplication.

Signed-off-by: default avatarOliver Neukum <oneukum@suse.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c40a2c88

drivers/net/usb/cdc_ncm.c

+9 −60
Original line number Diff line number Diff line
@@ -698,6 +698,7 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ 
	int len;

	int temp;

	u8 iface_no;

	struct usb_cdc_parsed_header hdr;



	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);

	if (!ctx)
@@ -722,66 +723,14 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ 
	len = intf->cur_altsetting->extralen;



	/* parse through descriptors associated with control interface */

	while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {

	cdc_parse_cdc_header(&hdr, intf, buf, len);



		if (buf[1] != USB_DT_CS_INTERFACE)

			goto advance;



		switch (buf[2]) {

		case USB_CDC_UNION_TYPE:

			if (buf[0] < sizeof(*union_desc))

				break;



			union_desc = (const struct usb_cdc_union_desc *)buf;

			/* the master must be the interface we are probing */

			if (intf->cur_altsetting->desc.bInterfaceNumber !=

			    union_desc->bMasterInterface0) {

				dev_dbg(&intf->dev, "bogus CDC Union\n");

				goto error;

			}

	ctx->data = usb_ifnum_to_if(dev->udev,

						    union_desc->bSlaveInterface0);

			break;



		case USB_CDC_ETHERNET_TYPE:

			if (buf[0] < sizeof(*(ctx->ether_desc)))

				break;



			ctx->ether_desc =

					(const struct usb_cdc_ether_desc *)buf;

			break;



		case USB_CDC_NCM_TYPE:

			if (buf[0] < sizeof(*(ctx->func_desc)))

				break;



			ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;

			break;



		case USB_CDC_MBIM_TYPE:

			if (buf[0] < sizeof(*(ctx->mbim_desc)))

				break;



			ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;

			break;



		case USB_CDC_MBIM_EXTENDED_TYPE:

			if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))

				break;



			ctx->mbim_extended_desc =

				(const struct usb_cdc_mbim_extended_desc *)buf;

			break;



		default:

			break;

		}

advance:

		/* advance to next descriptor */

		temp = buf[0];

		buf += temp;

		len -= temp;

	}

				    hdr.usb_cdc_union_desc->bSlaveInterface0);

	ctx->ether_desc = hdr.usb_cdc_ether_desc;

	ctx->func_desc = hdr.usb_cdc_ncm_desc;

	ctx->mbim_desc = hdr.usb_cdc_mbim_desc;

	ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc;



	/* some buggy devices have an IAD but no CDC Union */

	if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {