@@ -875,38 +875,18 @@ static int wdm_probe(struct usb_interface *intf, const struct usb_device_id *id)
int rv = -EINVAL;
struct usb_host_interface *iface;
struct usb_endpoint_descriptor *ep;
- struct usb_cdc_dmm_desc *dmhd;
+ struct usb_cdc_parsed_header hdr;
u8 *buffer = intf->altsetting->extra;
int buflen = intf->altsetting->extralen;
u16 maxcom = WDM_DEFAULT_BUFSIZE;
if (!buffer)
goto err;
- while (buflen > 2) {
- if (buffer[1] != USB_DT_CS_INTERFACE) {
- dev_err(&intf->dev, "skipping garbage\n");
- goto next_desc;
- }
- switch (buffer[2]) {
- case USB_CDC_HEADER_TYPE:
- break;
- case USB_CDC_DMM_TYPE:
- dmhd = (struct usb_cdc_dmm_desc *)buffer;
- maxcom = le16_to_cpu(dmhd->wMaxCommand);
- dev_dbg(&intf->dev,
- "Finding maximum buffer length: %d", maxcom);
- break;
- default:
- dev_err(&intf->dev,
- "Ignoring extra header, type %d, length %d\n",
- buffer[2], buffer[0]);
- break;
- }
-next_desc:
- buflen -= buffer[0];
- buffer += buffer[0];
- }
+ cdc_parse_cdc_header(&hdr, intf, buffer, buflen);
+
+ if (hdr.usb_cdc_dmm_desc)
+ maxcom = le16_to_cpu(hdr.usb_cdc_dmm_desc->wMaxCommand);
iface = intf->cur_altsetting;
if (iface->desc.bNumEndpoints != 1)
Now that the common parser resides in USB core, it can be used for CDC-WDM. Signed-off-by: Oliver Neukum <ONeukum@suse.com> --- drivers/usb/class/cdc-wdm.c | 30 +++++------------------------- 1 file changed, 5 insertions(+), 25 deletions(-)