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authorOliver Neukum <oneukum@suse.com>2016-07-14 15:41:33 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-07-18 08:46:57 -0700
commit7fae7bfb9a58ae66a29a6017abb7f62d2eb971e2 (patch)
treefd29749502aff17b7ab24ef4e93afaec866a2871 /drivers/usb/class
parent6dd3587f515ec4b1b8bcaaeb628ed1921eeed2ea (diff)
downloadlinux-7fae7bfb9a58ae66a29a6017abb7f62d2eb971e2.tar.bz2
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')
-rw-r--r--drivers/usb/class/cdc-wdm.c30
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)