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serial: tty: uartlite: fix console setup
[ Upstream commit d157fca711
]
Remove the hack to assign the global console_port variable at probe time.
This assumption that cons->index is -1 is wrong for systems that specify
'console=' in the cmdline (or 'stdout-path' in dts). Hence, on such system
the actual console assignment is ignored, and the first UART that happens
to be probed is used as console instead.
Move the logic to console_setup() and map the console to the correct port
through the array of available ports instead.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20210528133321.1859346-1-daniel@zonque.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
ba89ba738a
commit
1028b76960
1 changed files with 6 additions and 21 deletions
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@ -508,21 +508,23 @@ static void ulite_console_write(struct console *co, const char *s,
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static int ulite_console_setup(struct console *co, char *options)
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{
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struct uart_port *port;
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struct uart_port *port = NULL;
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int baud = 9600;
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int bits = 8;
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int parity = 'n';
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int flow = 'n';
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port = console_port;
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if (co->index >= 0 && co->index < ULITE_NR_UARTS)
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port = ulite_ports + co->index;
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/* Has the device been initialized yet? */
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if (!port->mapbase) {
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if (!port || !port->mapbase) {
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pr_debug("console on ttyUL%i not present\n", co->index);
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return -ENODEV;
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}
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console_port = port;
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/* not initialized yet? */
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if (!port->membase) {
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if (ulite_request_port(port))
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@ -658,17 +660,6 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq,
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dev_set_drvdata(dev, port);
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#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
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/*
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* If console hasn't been found yet try to assign this port
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* because it is required to be assigned for console setup function.
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* If register_console() don't assign value, then console_port pointer
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* is cleanup.
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*/
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if (ulite_uart_driver.cons->index == -1)
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console_port = port;
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#endif
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/* Register the port */
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rc = uart_add_one_port(&ulite_uart_driver, port);
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if (rc) {
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@ -678,12 +669,6 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq,
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return rc;
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}
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#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
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/* This is not port which is used for console that's why clean it up */
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if (ulite_uart_driver.cons->index == -1)
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console_port = NULL;
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#endif
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return 0;
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}
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