[PATCH 2/3] wifi: libertas: refactor endpoint lookup

[Johan Hovold <johan@kernel.org>]

Use the common USB helpers for looking up bulk and interrupt endpoints
(and determining max packet size) instead of open coding.

Note that the driver has an implicit max packet size check which is
kept.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 .../net/wireless/marvell/libertas/if_usb.c    | 33 +++++++++----------
 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/marvell/libertas/if_usb.c b/drivers/net/wireless/marvell/libertas/if_usb.c
index 05fcf9cc28fa..c880e54201c2 100644
--- a/drivers/net/wireless/marvell/libertas/if_usb.c
+++ b/drivers/net/wireless/marvell/libertas/if_usb.c
@@ -193,13 +193,12 @@ static void if_usb_reset_olpc_card(struct lbs_private *priv)
 static int if_usb_probe(struct usb_interface *intf,
 			const struct usb_device_id *id)
 {
+	struct usb_endpoint_descriptor *ep_in, *ep_out;
 	struct usb_device *udev;
 	struct usb_host_interface *iface_desc;
-	struct usb_endpoint_descriptor *endpoint;
 	struct lbs_private *priv;
 	struct if_usb_card *cardp;
 	int r = -ENOMEM;
-	int i;
 
 	udev = interface_to_usbdev(intf);
 
@@ -221,25 +220,25 @@ static int if_usb_probe(struct usb_interface *intf,
 		     udev->descriptor.bDeviceSubClass,
 		     udev->descriptor.bDeviceProtocol);
 
-	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
-		endpoint = &iface_desc->endpoint[i].desc;
-		if (usb_endpoint_is_bulk_in(endpoint)) {
-			cardp->ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
-			cardp->ep_in = usb_endpoint_num(endpoint);
+	if (usb_find_common_endpoints_reverse(iface_desc, &ep_in, &ep_out, NULL, NULL)) {
+		lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
+		goto dealloc;
+	}
 
-			lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
-			lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
+	cardp->ep_in_size = usb_endpoint_maxp(ep_in);
+	cardp->ep_in = usb_endpoint_num(ep_in);
 
-		} else if (usb_endpoint_is_bulk_out(endpoint)) {
-			cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
-			cardp->ep_out = usb_endpoint_num(endpoint);
+	lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
+	lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
+
+	cardp->ep_out_size = usb_endpoint_maxp(ep_out);
+	cardp->ep_out = usb_endpoint_num(ep_out);
+
+	lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
+	lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
 
-			lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
-			lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
-		}
-	}
 	if (!cardp->ep_out_size || !cardp->ep_in_size) {
-		lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
+		lbs_deb_usbd(&udev->dev, "Endpoints not valid\n");
 		goto dealloc;
 	}
 	if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
-- 
2.52.0