diff --git a/src/sem.c b/src/sem.c index 061caf4f5f3929918405b1de8f4272717480a348..87cfe021743c53ea45388e7f111dabee889cec9e 100644 --- a/src/sem.c +++ b/src/sem.c @@ -33,7 +33,7 @@ void sem_down(sem_t *sem) assert(sem->magic == SEM_MAGIC); irq_disable(); - if ((++sem->cpt) < 0) + if ((--sem->cpt) < 0) { current_ctx->status = CTX_WAIT; current_ctx->sem_next_ctx = sem->first_ctx;