This is a note to let you know that I've just added the patch titled
serial: tty: uartlite: fix console setup
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-tty-uartlite-fix-console-setup.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c7544f4aeb12fdb20017947746cdc5a47ec7a4fd
Author: Daniel Mack <daniel@xxxxxxxxxx>
Date: Fri May 28 15:33:20 2021 +0200
serial: tty: uartlite: fix console setup
[ Upstream commit d157fca711ad42e75efef3444c83d2e1a17be27a ]
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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210528133321.1859346-1-daniel@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index f42ccc40ffa6..a5f15f22d9ef 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -505,21 +505,23 @@ static void ulite_console_write(struct console *co, const char *s,
static int ulite_console_setup(struct console *co, char *options)
{
- struct uart_port *port;
+ struct uart_port *port = NULL;
int baud = 9600;
int bits = 8;
int parity = 'n';
int flow = 'n';
-
- port = console_port;
+ if (co->index >= 0 && co->index < ULITE_NR_UARTS)
+ port = ulite_ports + co->index;
/* Has the device been initialized yet? */
- if (!port->mapbase) {
+ if (!port || !port->mapbase) {
pr_debug("console on ttyUL%i not present\n", co->index);
return -ENODEV;
}
+ console_port = port;
+
/* not initialized yet? */
if (!port->membase) {
if (ulite_request_port(port))
@@ -655,17 +657,6 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq,
dev_set_drvdata(dev, port);
-#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
- /*
- * If console hasn't been found yet try to assign this port
- * because it is required to be assigned for console setup function.
- * If register_console() don't assign value, then console_port pointer
- * is cleanup.
- */
- if (ulite_uart_driver.cons->index == -1)
- console_port = port;
-#endif
-
/* Register the port */
rc = uart_add_one_port(&ulite_uart_driver, port);
if (rc) {
@@ -675,12 +666,6 @@ static int ulite_assign(struct device *dev, int id, u32 base, int irq,
return rc;
}
-#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
- /* This is not port which is used for console that's why clean it up */
- if (ulite_uart_driver.cons->index == -1)
- console_port = NULL;
-#endif
-
return 0;
}
