serial: core: Revert checks for tx runtime PM state

This reverts commit 81a61051e0ce5fd7e09225c0d5985da08c7954a7.

With tty and serdev controller moved to be children of the serial core
port device, runtime PM usage count of the serdev controller now
propagates to the serial hardware controller parent device as expected.

Cc: Maximilian Luz <luzmaximilian@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231113080758.30346-2-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index f36ea953e2c9f95c93bccb97f09bf920d6d7ea01..0393853b99475da4802eb9399d12a1b9a163db7b 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -156,7 +156,7 @@ static void __uart_start(struct uart_state *state)
         * enabled, serial_port_runtime_resume() calls start_tx() again
         * after enabling the device.
         */
-       if (!pm_runtime_enabled(port->dev) || pm_runtime_active(port->dev))
+       if (pm_runtime_active(&port_dev->dev))
                port->ops->start_tx(port);
        pm_runtime_mark_last_busy(&port_dev->dev);
        pm_runtime_put_autosuspend(&port_dev->dev);