diff options
| author | Oliver Neukum <oneukum@suse.com> | 2016-07-14 15:41:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-18 17:46:57 +0200 |
| commit | 7fae7bfb9a58ae66a29a6017abb7f62d2eb971e2 (patch) | |
| tree | fd29749502aff17b7ab24ef4e93afaec866a2871 /drivers/usb/class/cdc-wdm.c | |
| parent | cdc-acm: cleanup error handling (diff) | |
| download | linux-7fae7bfb9a58ae66a29a6017abb7f62d2eb971e2.tar.xz linux-7fae7bfb9a58ae66a29a6017abb7f62d2eb971e2.zip | |
cdc-wdm: use the common CDC parser
Now that the common parser resides in USB core, it can
be used for CDC-WDM.
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-wdm.c')
| -rw-r--r-- | drivers/usb/class/cdc-wdm.c | 30 |
1 files changed, 5 insertions, 25 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 61ea87917433..337948c42110 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -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) |