[PATCH RFC 3/3] Reapply "serial: 8250: Revert "drop lockdep annotation from serial8250_clear_IER()""

Michael Cobb
2025-05-14T17:35:45Z

This reverts commit 244eb5c6ec62ccab59ecac1f4815bb33130c423a.
---
drivers/tty/serial/8250/8250_port.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index ef7dfab908d8..af77fd966d6c 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -724,6 +724,9 @@ static void __serial8250_clear_IER(struct uart_8250_port *up)

static inline void serial8250_clear_IER(struct uart_8250_port *up)
{
+ /* Port locked to synchronize UART_IER access against the console */
+ lockdep_assert_held_once(&up->port.lock);
+
__serial8250_clear_IER(up);
}

--
2.45.2