The meson UART driver triggers a lockdep splat at boot time, due
to the new expectation that the driver has to initialize the
per-port spinlock itself.
It remains unclear why a double initialization of the port
spinlock is a desirable outcome, but in the meantime let's
fix the splat.
Fixes: a3cb39d258ef ("serial: core: Allow detach and attach serial device for console")
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
drivers/tty/serial/meson_uart.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index d2c08b760f83..386e39c90628 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -759,6 +759,9 @@ static int meson_uart_probe(struct platform_device *pdev)
if (ret)
return ret;
+ /* Init the spinlock early in case this is the console */
+ spin_lock_init(&port->lock);
+
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->mapsize = resource_size(res_mem);
--
2.26.2
