diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-17 11:35:41 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-23 13:53:53 +0100 |
| commit | 9b181166f17534a82b4b628b13e524a893715dfc (patch) | |
| tree | a595294b1ca4cd3f0fc5f3326db1146e41565cde /drivers/usb/misc | |
| parent | 2707ca16c2d400c8e2e619944470fb72ea96489f (diff) | |
USB: legousbtower: refactor endpoint retrieval
Use the new endpoint helpers to lookup the required interrupt-in and
interrupt-out endpoints.
Note that the descriptors are searched in reverse order to avoid any
regressions.
Cc: Juergen Stuber <starblue@users.sourceforge.net>
Cc: legousb-devel@lists.sourceforge.net
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc')
| -rw-r--r-- | drivers/usb/misc/legousbtower.c | 29 |
1 files changed, 7 insertions, 22 deletions
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index 322a042d6e59..201c9c3effbb 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -806,10 +806,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device struct device *idev = &interface->dev; struct usb_device *udev = interface_to_usbdev(interface); struct lego_usb_tower *dev = NULL; - struct usb_host_interface *iface_desc; - struct usb_endpoint_descriptor* endpoint; struct tower_get_version_reply get_version_reply; - int i; int retval = -ENOMEM; int result; @@ -846,25 +843,13 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device dev->interrupt_out_urb = NULL; dev->interrupt_out_busy = 0; - iface_desc = interface->cur_altsetting; - - /* set up the endpoint information */ - for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { - endpoint = &iface_desc->endpoint[i].desc; - - if (usb_endpoint_xfer_int(endpoint)) { - if (usb_endpoint_dir_in(endpoint)) - dev->interrupt_in_endpoint = endpoint; - else - dev->interrupt_out_endpoint = endpoint; - } - } - if(dev->interrupt_in_endpoint == NULL) { - dev_err(idev, "interrupt in endpoint not found\n"); - goto error; - } - if (dev->interrupt_out_endpoint == NULL) { - dev_err(idev, "interrupt out endpoint not found\n"); + result = usb_find_common_endpoints_reverse(interface->cur_altsetting, + NULL, NULL, + &dev->interrupt_in_endpoint, + &dev->interrupt_out_endpoint); + if (result) { + dev_err(idev, "interrupt endpoints not found\n"); + retval = result; goto error; } |