diff options
Diffstat (limited to 'kernel/ethosu_mailbox.c')
| -rw-r--r-- | kernel/ethosu_mailbox.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/ethosu_mailbox.c b/kernel/ethosu_mailbox.c index 158a7f5..7f159f3 100644 --- a/kernel/ethosu_mailbox.c +++ b/kernel/ethosu_mailbox.c @@ -128,7 +128,9 @@ static int ethosu_queue_read(struct ethosu_mailbox *mbox, uint32_t rpos = queue->header.read; size_t queue_avail = ethosu_queue_available(queue); - if (queue_avail == 0) + if (length == 0) + return 0; + else if (queue_avail == 0) return -ENOMSG; else if (length > queue_avail) return -EBADMSG; |