From 0ed2c976cc0bf569a3901be686a467150c089896 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sun, 10 Apr 2022 17:37:33 +0200
Subject: kernel/driver: modify the ps2/serial drivers to use ring_t

---
 src/shared/container/ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/shared/container')

diff --git a/src/shared/container/ring.c b/src/shared/container/ring.c
index 525fade..8c56acd 100644
--- a/src/shared/container/ring.c
+++ b/src/shared/container/ring.c
@@ -27,7 +27,7 @@ void ring_put1b(ring_t *r, uint8_t byte) {
 
 size_t ring_get(ring_t *r, void *buf, size_t len) {
 	for (size_t i = 0; i < len; i++) {
-		if (at_end(r)) return i;
+		if (r->_head == r->_tail || at_end(r)) return i;
 		((uint8_t*)buf)[i] = ((uint8_t*)r->buf)[r->_tail++];
 		if (r->_tail >= r->capacity) r->_tail = 0;
 	}
-- 
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