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83290f9f07
commit1aa4ad4eb6upstream. We are seeing start_tx being called after port shutdown as noted by Jiri. This happens because we are missing the startup and shutdown related functions for the serial base port. Let's fix the issue by adding startup and shutdown functions for the serial base port to block tx flushing for the serial base port when the port is not in use. Fixes:84a9582fd2("serial: core: Start managing serial controllers to enable runtime PM") Cc: stable <stable@kernel.org> Reported-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20240411055848.38190-1-tony@atomide.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Serial core related functions, serial port device drivers do not need this.
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*
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* Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
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* Author: Tony Lindgren <tony@atomide.com>
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*/
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#define to_serial_base_ctrl_device(d) container_of((d), struct serial_ctrl_device, dev)
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#define to_serial_base_port_device(d) container_of((d), struct serial_port_device, dev)
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struct uart_driver;
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struct uart_port;
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struct device_driver;
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struct device;
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struct serial_ctrl_device {
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struct device dev;
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struct ida port_ida;
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};
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struct serial_port_device {
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struct device dev;
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struct uart_port *port;
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unsigned int tx_enabled:1;
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};
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int serial_base_ctrl_init(void);
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void serial_base_ctrl_exit(void);
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int serial_base_port_init(void);
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void serial_base_port_exit(void);
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void serial_base_port_startup(struct uart_port *port);
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void serial_base_port_shutdown(struct uart_port *port);
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int serial_base_driver_register(struct device_driver *driver);
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void serial_base_driver_unregister(struct device_driver *driver);
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struct serial_ctrl_device *serial_base_ctrl_add(struct uart_port *port,
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struct device *parent);
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struct serial_port_device *serial_base_port_add(struct uart_port *port,
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struct serial_ctrl_device *parent);
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void serial_base_ctrl_device_remove(struct serial_ctrl_device *ctrl_dev);
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void serial_base_port_device_remove(struct serial_port_device *port_dev);
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int serial_ctrl_register_port(struct uart_driver *drv, struct uart_port *port);
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void serial_ctrl_unregister_port(struct uart_driver *drv, struct uart_port *port);
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int serial_core_register_port(struct uart_driver *drv, struct uart_port *port);
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void serial_core_unregister_port(struct uart_driver *drv, struct uart_port *port);
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