static struct usb_request *audio_request_new(struct usb_ep *ep, int buffer_size)
{
struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
+
if (!req)
return NULL;
/* compute number of frames to send */
now = ktime_get();
- msecs = ktime_to_ns(now) - ktime_to_ns(audio->start_time);
- do_div(msecs, 1000000);
- frames = msecs * SAMPLE_RATE;
- do_div(frames, 1000);
+ msecs = div_s64((ktime_to_ns(now) - ktime_to_ns(audio->start_time)),
+ 1000000);
+ frames = div_s64((msecs * SAMPLE_RATE), 1000);
/* Readjust our frames_sent if we fall too far behind.
* If we get too far behind it is better to drop some frames than