From bc4e474ed84e77335ab90668378df7ec22cd571e Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Fri, 17 May 2024 22:53:05 -0400
Subject: kernel: tty: Append to ring before length check

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/kern_tty.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sys/kern')

diff --git a/sys/kern/kern_tty.c b/sys/kern/kern_tty.c
index 39b94f7..641e7ba 100644
--- a/sys/kern/kern_tty.c
+++ b/sys/kern/kern_tty.c
@@ -135,12 +135,12 @@ tty_putc(struct tty *tty, int c)
 
     ring = &tty->ring;
     spinlock_acquire(&tty->rlock);
+    ring->data[ring->enq_index++] = c;
 
     if (ring->enq_index >= TTY_RING_SIZE) {
         __tty_flush(tty);
     }
 
-    ring->data[ring->enq_index++] = c;
     spinlock_release(&tty->rlock);
     return 0;
 }
-- 
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