staging/easycap: probe: simplify the endpoints tests

we are interested only in isochronous in endpoints
so we can simplify the flow

Cc: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/easycap/easycap_main.c

@@ -2988,7 +2988,7 @@ static int easycap_usb_probe(struct usb_interface *intf,
 	struct data_urb *pdata_urb;
 	size_t wMaxPacketSize;
 	u8 bEndpointAddress;
-	int isin, i, j, k, m, rc;
+	int i, j, k, m, rc;
 	u8 bInterfaceNumber;
 	u8 bInterfaceClass;
 	u8 bInterfaceSubClass;
@@ -3353,30 +3353,20 @@ static int easycap_usb_probe(struct usb_interface *intf,
 			wMaxPacketSize = le16_to_cpu(ep->wMaxPacketSize);
 			bEndpointAddress = ep->bEndpointAddress;
 
-			if (ep->bEndpointAddress & USB_DIR_IN) {
-				JOM(4, "intf[%i]alt[%i]end[%i] is an  IN  endpoint\n",
-							bInterfaceNumber, i, j);
-				isin = 1;
-			} else {
-				JOM(4, "intf[%i]alt[%i]end[%i] is an  OUT endpoint\n",
-							bInterfaceNumber, i, j);
+
+			if (!usb_endpoint_is_isoc_in(ep)) {
+				JOM(4, "intf[%i]alt[%i]end[%i] is a %d endpoint\n",
+						bInterfaceNumber,
+						i, j, ep->bmAttributes);
+				if (usb_endpoint_dir_out(ep)) {
 					SAM("ERROR: OUT endpoint unexpected\n");
 					SAM("...... continuing\n");
-				isin = 0;
 				}
-			if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
-						USB_ENDPOINT_XFER_ISOC) {
-				JOM(4, "intf[%i]alt[%i]end[%i] is an ISOC endpoint\n",
-							bInterfaceNumber, i, j);
-				if (isin) {
+				continue;
+			}
 			switch (bInterfaceClass) {
 			case USB_CLASS_VIDEO:
 			case USB_CLASS_VENDOR_SPEC: {
-						if (!peasycap) {
-							SAM("MISTAKE: "
-								"peasycap is NULL\n");
-							return -EFAULT;
-						}
 				if (ep->wMaxPacketSize) {
 					if (8 > isokalt) {
 						okalt[isokalt] = i;
@@ -3488,21 +3478,6 @@ static int easycap_usb_probe(struct usb_interface *intf,
 			default:
 				break;
 			}
-				}
-			} else if ((ep->bmAttributes &
-							USB_ENDPOINT_XFERTYPE_MASK) ==
-							USB_ENDPOINT_XFER_BULK) {
-				JOM(4, "intf[%i]alt[%i]end[%i] is a  BULK endpoint\n",
-							bInterfaceNumber, i, j);
-			} else if ((ep->bmAttributes &
-							USB_ENDPOINT_XFERTYPE_MASK) ==
-							USB_ENDPOINT_XFER_INT) {
-				JOM(4, "intf[%i]alt[%i]end[%i] is an  INT endpoint\n",
-							bInterfaceNumber, i, j);
-			} else {
-				JOM(4, "intf[%i]alt[%i]end[%i] is a  CTRL endpoint\n",
-							bInterfaceNumber, i, j);
-			}
 			if (0 == ep->wMaxPacketSize) {
 				JOM(4, "intf[%i]alt[%i]end[%i] "
 							"has zero packet size\n",