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USB: chaoskey: refactor endpoint retrieval 

Use the new endpoint helpers to lookup the required bulk-in endpoint.

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-03-17 11:35:36 +01:00 committed by Greg Kroah-Hartman
parent c77b8855c6
commit a8bbb0f8db
1 changed files with 10 additions and 12 deletions
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22
drivers/usb/misc/chaoskey.c
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@ -117,28 +117,26 @@ static int chaoskey_probe(struct usb_interface *interface,
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *altsetting = interface->cur_altsetting;
int i;
int in_ep = -1;
struct usb_endpoint_descriptor *epd;
int in_ep;
struct chaoskey *dev;
int result = -ENOMEM;
int size;
int res;
usb_dbg(interface, "probe %s-%s", udev->product, udev->serial);
/* Find the first bulk IN endpoint and its packet size */
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
if (usb_endpoint_is_bulk_in(&altsetting->endpoint[i].desc)) {
in_ep = usb_endpoint_num(&altsetting->endpoint[i].desc);
size = usb_endpoint_maxp(&altsetting->endpoint[i].desc);
break;
}
res = usb_find_bulk_in_endpoint(altsetting, &epd);
if (res) {
usb_dbg(interface, "no IN endpoint found");
return res;
}
in_ep = usb_endpoint_num(epd);
size = usb_endpoint_maxp(epd);
/* Validate endpoint and size */
if (in_ep == -1) {
usb_dbg(interface, "no IN endpoint found");
return -ENODEV;
}
if (size <= 0) {
usb_dbg(interface, "invalid size (%d)", size);
return -ENODEV;