return NULL;
}
+/* check the validity of pipe and EP types */
+int snd_usb_pipe_sanity_check(struct usb_device *dev, unsigned int pipe)
+{
+ static const int pipetypes[4] = {
+ PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
+ };
+ struct usb_host_endpoint *ep;
+
+ ep = usb_pipe_endpoint(dev, pipe);
+ if (usb_pipetype(pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
+ return -EINVAL;
+ return 0;
+}
+
/*
* Wrapper for usb_control_msg().
* Allocates a temp buffer to prevent dmaing from/to the stack.
void *buf = NULL;
int timeout;
+ if (snd_usb_pipe_sanity_check(dev, pipe))
+ return -EINVAL;
+
if (size > 0) {
buf = kmemdup(data, size, GFP_KERNEL);
if (!buf)