diff options
| author | Kristofer Jonsson <kristofer.jonsson@arm.com> | 2022-06-28 14:09:19 +0200 |
|---|---|---|
| committer | Kristofer Jonsson <kristofer.jonsson@arm.com> | 2022-06-29 12:09:52 +0200 |
| commit | e2a581556c65d4bf6fbffa45286ff797e2fe8ca3 (patch) | |
| tree | edcca9d7387bd8382937fd0e413463d70cd15aa5 | |
| parent | e3e264343bac8f2bbcacdf84c13383766b0e6aff (diff) | |
| download | ethos-u-linux-driver-stack-e2a581556c65d4bf6fbffa45286ff797e2fe8ca3.tar.gz | |
Bug fix for queue capacity calculation
Reduce queue capacity by one byte, else it will not be possible to
distinguish between an empty and full queue.
Change-Id: Ia243a7175833826dc816d536cc79ac5a252f3e3a
| -rw-r--r-- | kernel/ethosu_mailbox.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/ethosu_mailbox.c b/kernel/ethosu_mailbox.c index 014ceb8..b5cde0d 100644 --- a/kernel/ethosu_mailbox.c +++ b/kernel/ethosu_mailbox.c @@ -105,7 +105,8 @@ static size_t ethosu_queue_available(struct ethosu_core_queue *queue) static size_t ethosu_queue_capacity(struct ethosu_core_queue *queue) { - return queue->header.size - ethosu_queue_available(queue); + return max_t(ssize_t, + queue->header.size - ethosu_queue_available(queue) - 1, 0); } static int ethosu_queue_write(struct ethosu_mailbox *mbox, |