return -EINVAL;
}
-/* relay channel default callbacks */
-static struct rchan_callbacks default_channel_callbacks = {
- .subbuf_start = subbuf_start_default_callback,
- .create_buf_file = create_buf_file_default_callback,
- .remove_buf_file = remove_buf_file_default_callback,
-};
-
/**
* wakeup_readers - wake up readers waiting on a channel
* @work: contains the channel buffer
static void setup_callbacks(struct rchan *chan,
struct rchan_callbacks *cb)
{
- if (!cb) {
- chan->cb = &default_channel_callbacks;
- return;
- }
-
if (!cb->subbuf_start)
cb->subbuf_start = subbuf_start_default_callback;
if (!cb->create_buf_file)
return NULL;
if (subbuf_size > UINT_MAX / n_subbufs)
return NULL;
+ if (!cb)
+ return NULL;
chan = kzalloc(sizeof(struct rchan), GFP_KERNEL);
if (!chan)