From 272350d0bd716e7bf9fb2f1a6aec4893252b9416 Mon Sep 17 00:00:00 2001
From: Keith Bussell <kbussell@gmail.com>
Date: Sat, 6 Jan 2024 15:46:30 -0800
Subject: [PATCH] Update signature of tty write operation to work with Linux
 kernel 6.6

see https://docs.kernel.org/6.6/driver-api/tty/tty_driver.html#c.tty_operations
---
 driver/ch341.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/driver/ch341.c b/driver/ch341.c
index 89ac21d..8eb2abc 100644
--- a/driver/ch341.c
+++ b/driver/ch341.c
@@ -643,7 +643,11 @@ static void ch341_tty_close(struct tty_struct *tty, struct file *filp)
 	tty_port_close(&ch341->port, tty, filp);
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(6, 6, 0))
+static ssize_t ch341_tty_write(struct tty_struct *tty, const unsigned char *buf, size_t count)
+#else
 static int ch341_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
+#endif
 {
 	struct ch341 *ch341 = tty->driver_data;
 	int stat;