Make that queue_request() call into a clear_feature() call, as that's how it was

probably meant to be. The call as it was made no sense at all, as it hardcoded
the endpoint number and tried to supply data to a non-data request. It also
wasn't using a synchronous call, possibly triggering the callback function with
an incompletely set-up device structure, depending on how quickly the request
would return. This caused bug #4107.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31666 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/drivers/midi/usb_midi/usb_midi.c

@@ -273,17 +273,10 @@ got_one:
 	if ((my_dev = create_device (dev, intf, ifno)) == NULL) {
 		return B_ERROR;
 	}
-	
-	st = usb->queue_request(dev, 
-		USB_REQTYPE_ENDPOINT_OUT | USB_REQTYPE_STANDARD,
-		USB_REQUEST_CLEAR_FEATURE,
-		USB_FEATURE_ENDPOINT_HALT, 1, my_dev->total_report_size, 
-		my_dev->buffer, my_dev->total_report_size, midi_usb_callback, my_dev);
-	if (st != B_OK) {
-		DPRINTF_ERR ((MY_ID "queue_request() error %d\n", (int)st));
-		return B_ERROR;
-	}
-	
+
+	usb->clear_feature(intf->endpoint[0].handle, USB_FEATURE_ENDPOINT_HALT);
+		// TODO: verify if this is necessary at all
+
 	my_dev->timestamp = system_time ();
 
 	/* issue bulk transfer */