USB: ldusb: refactor endpoint retrieval

Use the new endpoint helpers to lookup the required interrupt-in
endpoint and optional interrupt-out endpoint.

Note that the descriptors are searched in reverse order to avoid any
regressions.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 14 deletions

diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c
index 77b76b468307..9d9487c66f87 100644
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -650,10 +650,9 @@ static int ld_usb_probe(struct usb_interface *intf, const struct usb_device_id *
         struct usb_device *udev = interface_to_usbdev(intf);
         struct ld_usb *dev = NULL;
         struct usb_host_interface *iface_desc;
-        struct usb_endpoint_descriptor *endpoint;
         char *buffer;
-        int i;
         int retval = -ENOMEM;
+        int res;
 
         /* allocate memory for our device state and initialize it */
 
@@ -681,21 +680,17 @@ static int ld_usb_probe(struct usb_interface *intf, const struct usb_device_id *
 
         iface_desc = intf->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_is_int_in(endpoint))
-                        dev->interrupt_in_endpoint = endpoint;
-
-                if (usb_endpoint_is_int_out(endpoint))
-                        dev->interrupt_out_endpoint = endpoint;
-        }
-        if (dev->interrupt_in_endpoint == NULL) {
+        res = usb_find_last_int_in_endpoint(iface_desc,
+                        &dev->interrupt_in_endpoint);
+        if (res) {
                 dev_err(&intf->dev, "Interrupt in endpoint not found\n");
+                retval = res;
                 goto error;
         }
-        if (dev->interrupt_out_endpoint == NULL)
+
+        res = usb_find_last_int_out_endpoint(iface_desc,
+                        &dev->interrupt_out_endpoint);
+        if (res)
                 dev_warn(&intf->dev, "Interrupt out endpoint not found (using control endpoint instead)\n");
 
         dev->interrupt_in_endpoint_size = usb_endpoint_maxp(dev->interrupt_in_endpoint);